diff --git a/src/internal/assert-locale-data.ts b/src/internal/assert-locale-data.ts
new file mode 100644
index 00000000000..5bac7d92c65
--- /dev/null
+++ b/src/internal/assert-locale-data.ts
@@ -0,0 +1,32 @@
+import { FakerError } from '../errors/faker-error';
+
+/**
+ * Checks that the value is not null or undefined and throws an error if it is.
+ *
+ * @param value The value to check.
+ * @param path The path to the locale data.
+ *
+ * @returns The value if it's not null or undefined.
+ *
+ * @throws {FakerError} If the value is null or undefined.
+ */
+export function assertLocaleData<T>(
+  value: T,
+  ...path: string[]
+): NonNullable<T> {
+  if (value === null) {
+    throw new FakerError(
+      `The locale data for '${path.join('.')}' aren't applicable to this locale.
+  If you think this is a bug, please report it at: https://github.com/faker-js/faker`
+    );
+  } else if (value === undefined) {
+    throw new FakerError(
+      `The locale data for '${path.join('.')}' are missing in this locale.
+  If this is a custom Faker instance, please make sure all required locales are used e.g. '[de_AT, de, en, base]'.
+  Please contribute the missing data to the project or use a locale/Faker instance that has these data.
+  For more information see https://fakerjs.dev/guide/localization.html`
+    );
+  }
+
+  return value;
+}
diff --git a/src/internal/locale-proxy.ts b/src/internal/locale-proxy.ts
index 3e77a93a4cd..fd301ab298d 100644
--- a/src/internal/locale-proxy.ts
+++ b/src/internal/locale-proxy.ts
@@ -1,5 +1,6 @@
 import type { LocaleDefinition } from '../definitions';
 import { FakerError } from '../errors/faker-error';
+import { assertLocaleData } from './assert-locale-data';
 
 /**
  * A proxy for LocaleDefinition that marks all properties as required and throws an error when an entry is accessed that is not defined.
@@ -54,31 +55,6 @@ export function createLocaleProxy(locale: LocaleDefinition): LocaleProxy {
   }) as LocaleProxy;
 }
 
-/**
- * Checks that the value is not null or undefined and throws an error if it is.
- *
- * @param value The value to check.
- * @param path The path to the locale data.
- */
-export function assertLocaleData<T>(
-  value: T,
-  ...path: string[]
-): asserts value is NonNullable<T> {
-  if (value === null) {
-    throw new FakerError(
-      `The locale data for '${path.join('.')}' aren't applicable to this locale.
-  If you think this is a bug, please report it at: https://github.com/faker-js/faker`
-    );
-  } else if (value === undefined) {
-    throw new FakerError(
-      `The locale data for '${path.join('.')}' are missing in this locale.
-  If this is a custom Faker instance, please make sure all required locales are used e.g. '[de_AT, de, en, base]'.
-  Please contribute the missing data to the project or use a locale/Faker instance that has these data.
-  For more information see https://fakerjs.dev/guide/localization.html`
-    );
-  }
-}
-
 /**
  * Creates a proxy for a category that throws an error when accessing an undefined property.
  *
@@ -106,8 +82,7 @@ function createCategoryProxy<
         return value;
       }
 
-      assertLocaleData(value, categoryName, entryName.toString());
-      return value;
+      return assertLocaleData(value, categoryName, entryName.toString());
     },
 
     set: throwReadOnlyError,
diff --git a/src/modules/airline/index.ts b/src/modules/airline/index.ts
index e8ac47c58c2..258401d1f10 100644
--- a/src/modules/airline/index.ts
+++ b/src/modules/airline/index.ts
@@ -4,6 +4,7 @@
  * responsible for setting standards relating to many aspects of airline
  * operations.
  */
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 
 export enum Aircraft {
@@ -88,7 +89,10 @@ export class AirlineModule extends ModuleBase {
    */
   airport(): Airport {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.airline.airport
+      assertLocaleData(
+        this.faker.fakerCore.locale.airline?.airport,
+        'airline.airport'
+      )
     );
   }
 
@@ -102,7 +106,10 @@ export class AirlineModule extends ModuleBase {
    */
   airline(): Airline {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.airline.airline
+      assertLocaleData(
+        this.faker.fakerCore.locale.airline?.airline,
+        'airline.airline'
+      )
     );
   }
 
@@ -116,7 +123,10 @@ export class AirlineModule extends ModuleBase {
    */
   airplane(): Airplane {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.airline.airplane
+      assertLocaleData(
+        this.faker.fakerCore.locale.airline?.airplane,
+        'airline.airplane'
+      )
     );
   }
 
diff --git a/src/modules/animal/index.ts b/src/modules/animal/index.ts
index bb200a31c0a..e81950f44b5 100644
--- a/src/modules/animal/index.ts
+++ b/src/modules/animal/index.ts
@@ -1,3 +1,4 @@
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 
 /**
@@ -21,7 +22,9 @@ export class AnimalModule extends ModuleBase {
    * @since 5.5.0
    */
   dog(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.animal.dog);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.animal?.dog, 'animal.dog')
+    );
   }
 
   /**
@@ -33,7 +36,9 @@ export class AnimalModule extends ModuleBase {
    * @since 5.5.0
    */
   cat(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.animal.cat);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.animal?.cat, 'animal.cat')
+    );
   }
 
   /**
@@ -45,7 +50,12 @@ export class AnimalModule extends ModuleBase {
    * @since 5.5.0
    */
   snake(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.animal.snake);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(
+        this.faker.fakerCore.locale.animal?.snake,
+        'animal.snake'
+      )
+    );
   }
 
   /**
@@ -57,7 +67,9 @@ export class AnimalModule extends ModuleBase {
    * @since 5.5.0
    */
   bear(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.animal.bear);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.animal?.bear, 'animal.bear')
+    );
   }
 
   /**
@@ -69,7 +81,9 @@ export class AnimalModule extends ModuleBase {
    * @since 5.5.0
    */
   lion(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.animal.lion);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.animal?.lion, 'animal.lion')
+    );
   }
 
   /**
@@ -82,7 +96,10 @@ export class AnimalModule extends ModuleBase {
    */
   cetacean(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.animal.cetacean
+      assertLocaleData(
+        this.faker.fakerCore.locale.animal?.cetacean,
+        'animal.cetacean'
+      )
     );
   }
 
@@ -95,7 +112,12 @@ export class AnimalModule extends ModuleBase {
    * @since 5.5.0
    */
   horse(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.animal.horse);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(
+        this.faker.fakerCore.locale.animal?.horse,
+        'animal.horse'
+      )
+    );
   }
 
   /**
@@ -107,7 +129,9 @@ export class AnimalModule extends ModuleBase {
    * @since 5.5.0
    */
   bird(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.animal.bird);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.animal?.bird, 'animal.bird')
+    );
   }
 
   /**
@@ -119,7 +143,9 @@ export class AnimalModule extends ModuleBase {
    * @since 5.5.0
    */
   cow(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.animal.cow);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.animal?.cow, 'animal.cow')
+    );
   }
 
   /**
@@ -131,7 +157,9 @@ export class AnimalModule extends ModuleBase {
    * @since 5.5.0
    */
   fish(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.animal.fish);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.animal?.fish, 'animal.fish')
+    );
   }
 
   /**
@@ -144,7 +172,10 @@ export class AnimalModule extends ModuleBase {
    */
   crocodilia(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.animal.crocodilia
+      assertLocaleData(
+        this.faker.fakerCore.locale.animal?.crocodilia,
+        'animal.crocodilia'
+      )
     );
   }
 
@@ -158,7 +189,10 @@ export class AnimalModule extends ModuleBase {
    */
   insect(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.animal.insect
+      assertLocaleData(
+        this.faker.fakerCore.locale.animal?.insect,
+        'animal.insect'
+      )
     );
   }
 
@@ -172,7 +206,10 @@ export class AnimalModule extends ModuleBase {
    */
   rabbit(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.animal.rabbit
+      assertLocaleData(
+        this.faker.fakerCore.locale.animal?.rabbit,
+        'animal.rabbit'
+      )
     );
   }
 
@@ -186,7 +223,10 @@ export class AnimalModule extends ModuleBase {
    */
   rodent(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.animal.rodent
+      assertLocaleData(
+        this.faker.fakerCore.locale.animal?.rodent,
+        'animal.rodent'
+      )
     );
   }
 
@@ -199,7 +239,9 @@ export class AnimalModule extends ModuleBase {
    * @since 5.5.0
    */
   type(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.animal.type);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.animal?.type, 'animal.type')
+    );
   }
 
   /**
@@ -212,7 +254,10 @@ export class AnimalModule extends ModuleBase {
    */
   petName(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.animal.pet_name
+      assertLocaleData(
+        this.faker.fakerCore.locale.animal?.pet_name,
+        'animal.pet_name'
+      )
     );
   }
 }
diff --git a/src/modules/book/index.ts b/src/modules/book/index.ts
index 86e168d2ad4..1b00b9a4bd0 100644
--- a/src/modules/book/index.ts
+++ b/src/modules/book/index.ts
@@ -1,3 +1,4 @@
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 
 /**
@@ -26,7 +27,9 @@ export class BookModule extends ModuleBase {
    * @since 9.1.0
    */
   author(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.book.author);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.book?.author, 'book.author')
+    );
   }
 
   /**
@@ -38,7 +41,9 @@ export class BookModule extends ModuleBase {
    * @since 9.1.0
    */
   format(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.book.format);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.book?.format, 'book.format')
+    );
   }
 
   /**
@@ -50,7 +55,9 @@ export class BookModule extends ModuleBase {
    * @since 9.1.0
    */
   genre(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.book.genre);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.book?.genre, 'book.genre')
+    );
   }
 
   /**
@@ -63,7 +70,10 @@ export class BookModule extends ModuleBase {
    */
   publisher(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.book.publisher
+      assertLocaleData(
+        this.faker.fakerCore.locale.book?.publisher,
+        'book.publisher'
+      )
     );
   }
 
@@ -76,7 +86,9 @@ export class BookModule extends ModuleBase {
    * @since 9.1.0
    */
   series(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.book.series);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.book?.series, 'book.series')
+    );
   }
 
   /**
@@ -88,6 +100,8 @@ export class BookModule extends ModuleBase {
    * @since 9.1.0
    */
   title(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.book.title);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.book?.title, 'book.title')
+    );
   }
 }
diff --git a/src/modules/color/index.ts b/src/modules/color/index.ts
index 0bfdc8858b7..72c626d2e9e 100644
--- a/src/modules/color/index.ts
+++ b/src/modules/color/index.ts
@@ -1,3 +1,4 @@
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 
 /**
@@ -217,7 +218,9 @@ export class ColorModule extends ModuleBase {
    * @since 7.0.0
    */
   human(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.color.human);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.color?.human, 'color.human')
+    );
   }
 
   /**
@@ -230,7 +233,9 @@ export class ColorModule extends ModuleBase {
    * @since 7.0.0
    */
   space(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.color.space);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.color?.space, 'color.space')
+    );
   }
 
   /**
diff --git a/src/modules/commerce/index.ts b/src/modules/commerce/index.ts
index ef27c161e2b..8304a18758e 100644
--- a/src/modules/commerce/index.ts
+++ b/src/modules/commerce/index.ts
@@ -1,4 +1,5 @@
 import { FakerError } from '../../errors/faker-error';
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 import { calculateUPCCheckDigit } from './upc-check-digit';
 
@@ -99,7 +100,10 @@ export class CommerceModule extends ModuleBase {
    */
   department(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.commerce.department
+      assertLocaleData(
+        this.faker.fakerCore.locale.commerce?.department,
+        'commerce.department'
+      )
     );
   }
 
@@ -112,7 +116,10 @@ export class CommerceModule extends ModuleBase {
    * @since 3.0.0
    */
   productName(): string {
-    const patterns = this.faker.definitions.commerce.product_name.pattern;
+    const patterns = assertLocaleData(
+      this.faker.fakerCore.locale.commerce?.product_name,
+      'commerce.product_name'
+    ).pattern;
     return this.faker.helpers.fake(patterns);
   }
 
@@ -222,7 +229,10 @@ export class CommerceModule extends ModuleBase {
    */
   productAdjective(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.commerce.product_name.adjective
+      assertLocaleData(
+        this.faker.fakerCore.locale.commerce?.product_name,
+        'commerce.product_name'
+      ).adjective
     );
   }
 
@@ -236,7 +246,10 @@ export class CommerceModule extends ModuleBase {
    */
   productMaterial(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.commerce.product_name.material
+      assertLocaleData(
+        this.faker.fakerCore.locale.commerce?.product_name,
+        'commerce.product_name'
+      ).material
     );
   }
 
@@ -250,7 +263,10 @@ export class CommerceModule extends ModuleBase {
    */
   product(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.commerce.product_name.product
+      assertLocaleData(
+        this.faker.fakerCore.locale.commerce?.product_name,
+        'commerce.product_name'
+      ).product
     );
   }
 
@@ -264,7 +280,10 @@ export class CommerceModule extends ModuleBase {
    */
   productDescription(): string {
     return this.faker.helpers.fake(
-      this.faker.definitions.commerce.product_description
+      assertLocaleData(
+        this.faker.fakerCore.locale.commerce?.product_description,
+        'commerce.product_description'
+      )
     );
   }
 
diff --git a/src/modules/company/index.ts b/src/modules/company/index.ts
index b4e8befd79a..3451910bb4d 100644
--- a/src/modules/company/index.ts
+++ b/src/modules/company/index.ts
@@ -1,3 +1,4 @@
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 
 /**
@@ -24,7 +25,12 @@ export class CompanyModule extends ModuleBase {
    * @since 7.4.0
    */
   name(): string {
-    return this.faker.helpers.fake(this.faker.definitions.company.name_pattern);
+    return this.faker.helpers.fake(
+      assertLocaleData(
+        this.faker.fakerCore.locale.company?.name_pattern,
+        'company.name_pattern'
+      )
+    );
   }
 
   /**
@@ -65,7 +71,10 @@ export class CompanyModule extends ModuleBase {
    */
   catchPhraseAdjective(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.company.adjective
+      assertLocaleData(
+        this.faker.fakerCore.locale.company?.adjective,
+        'company.adjective'
+      )
     );
   }
 
@@ -79,7 +88,10 @@ export class CompanyModule extends ModuleBase {
    */
   catchPhraseDescriptor(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.company.descriptor
+      assertLocaleData(
+        this.faker.fakerCore.locale.company?.descriptor,
+        'company.descriptor'
+      )
     );
   }
 
@@ -92,7 +104,12 @@ export class CompanyModule extends ModuleBase {
    * @since 2.0.1
    */
   catchPhraseNoun(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.company.noun);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(
+        this.faker.fakerCore.locale.company?.noun,
+        'company.noun'
+      )
+    );
   }
 
   /**
@@ -105,7 +122,10 @@ export class CompanyModule extends ModuleBase {
    */
   buzzAdjective(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.company.buzz_adjective
+      assertLocaleData(
+        this.faker.fakerCore.locale.company?.buzz_adjective,
+        'company.buzz_adjective'
+      )
     );
   }
 
@@ -119,7 +139,10 @@ export class CompanyModule extends ModuleBase {
    */
   buzzVerb(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.company.buzz_verb
+      assertLocaleData(
+        this.faker.fakerCore.locale.company?.buzz_verb,
+        'company.buzz_verb'
+      )
     );
   }
 
@@ -133,7 +156,10 @@ export class CompanyModule extends ModuleBase {
    */
   buzzNoun(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.company.buzz_noun
+      assertLocaleData(
+        this.faker.fakerCore.locale.company?.buzz_noun,
+        'company.buzz_noun'
+      )
     );
   }
 }
diff --git a/src/modules/database/index.ts b/src/modules/database/index.ts
index 6c3595cc4fc..4858522c185 100644
--- a/src/modules/database/index.ts
+++ b/src/modules/database/index.ts
@@ -1,3 +1,4 @@
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 
 /**
@@ -20,7 +21,10 @@ export class DatabaseModule extends ModuleBase {
    */
   column(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.database.column
+      assertLocaleData(
+        this.faker.fakerCore.locale.database?.column,
+        'database.column'
+      )
     );
   }
 
@@ -34,7 +38,10 @@ export class DatabaseModule extends ModuleBase {
    */
   type(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.database.type
+      assertLocaleData(
+        this.faker.fakerCore.locale.database?.type,
+        'database.type'
+      )
     );
   }
 
@@ -48,7 +55,10 @@ export class DatabaseModule extends ModuleBase {
    */
   collation(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.database.collation
+      assertLocaleData(
+        this.faker.fakerCore.locale.database?.collation,
+        'database.collation'
+      )
     );
   }
 
@@ -62,7 +72,10 @@ export class DatabaseModule extends ModuleBase {
    */
   engine(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.database.engine
+      assertLocaleData(
+        this.faker.fakerCore.locale.database?.engine,
+        'database.engine'
+      )
     );
   }
 
diff --git a/src/modules/date/index.ts b/src/modules/date/index.ts
index 1bea401cbeb..ed47b7e6dc3 100644
--- a/src/modules/date/index.ts
+++ b/src/modules/date/index.ts
@@ -1,8 +1,8 @@
 import type { DateEntryDefinition } from '../../definitions';
 import { FakerError } from '../../errors/faker-error';
 import type { Faker } from '../../faker';
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { toDate } from '../../internal/date';
-import { assertLocaleData } from '../../internal/locale-proxy';
 import { SimpleModuleBase } from '../../internal/module-base';
 
 /**
@@ -647,7 +647,10 @@ export class DateModule extends SimpleDateModule {
   ): string {
     const { abbreviated = false, context = false } = options;
 
-    const source = this.faker.definitions.date.month;
+    const source = assertLocaleData(
+      this.faker.fakerCore.locale.date?.month,
+      'date.month'
+    );
     let type: keyof DateEntryDefinition;
     if (abbreviated) {
       const useContext = context && source['abbr_context'] != null;
@@ -657,9 +660,9 @@ export class DateModule extends SimpleDateModule {
       type = useContext ? 'wide_context' : 'wide';
     }
 
-    const values = source[type];
-    assertLocaleData(values, 'date.month', type);
-    return this.faker.helpers.arrayElement(values);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(source[type], 'date.month', type)
+    );
   }
 
   /**
@@ -699,7 +702,10 @@ export class DateModule extends SimpleDateModule {
   ): string {
     const { abbreviated = false, context = false } = options;
 
-    const source = this.faker.definitions.date.weekday;
+    const source = assertLocaleData(
+      this.faker.fakerCore.locale.date?.weekday,
+      'date.weekday'
+    );
     let type: keyof DateEntryDefinition;
     if (abbreviated) {
       const useContext = context && source['abbr_context'] != null;
@@ -709,9 +715,9 @@ export class DateModule extends SimpleDateModule {
       type = useContext ? 'wide_context' : 'wide';
     }
 
-    const values = source[type];
-    assertLocaleData(values, 'date.weekday', type);
-    return this.faker.helpers.arrayElement(values);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(source[type], 'date.weekday', type)
+    );
   }
 
   /**
@@ -729,7 +735,10 @@ export class DateModule extends SimpleDateModule {
    */
   timeZone(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.date.time_zone
+      assertLocaleData(
+        this.faker.fakerCore.locale.date?.time_zone,
+        'date.time_zone'
+      )
     );
   }
 }
diff --git a/src/modules/finance/index.ts b/src/modules/finance/index.ts
index 5139b1f3124..0688a0c2bdb 100644
--- a/src/modules/finance/index.ts
+++ b/src/modules/finance/index.ts
@@ -1,4 +1,5 @@
 import { FakerError } from '../../errors/faker-error';
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 import type { BitcoinAddressFamilyType, BitcoinNetworkType } from './bitcoin';
 import {
@@ -173,7 +174,10 @@ export class FinanceModule extends ModuleBase {
   accountName(): string {
     return [
       this.faker.helpers.arrayElement(
-        this.faker.definitions.finance.account_type
+        assertLocaleData(
+          this.faker.fakerCore.locale.finance?.account_type,
+          'finance.account_type'
+        )
       ),
       'Account',
     ].join(' ');
@@ -189,7 +193,10 @@ export class FinanceModule extends ModuleBase {
    */
   routingNumber(): string {
     const federalReserveRoutingSymbol = this.faker.helpers.arrayElement(
-      this.faker.definitions.finance.federal_reserve_routing_symbol
+      assertLocaleData(
+        this.faker.fakerCore.locale.finance?.federal_reserve_routing_symbol,
+        'finance.federal_reserve_routing_symbol'
+      )
     );
 
     const institutionIdentifier = this.faker.string.numeric({
@@ -297,7 +304,10 @@ export class FinanceModule extends ModuleBase {
    */
   transactionType(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.finance.transaction_type
+      assertLocaleData(
+        this.faker.fakerCore.locale.finance?.transaction_type,
+        'finance.transaction_type'
+      )
     );
   }
 
@@ -316,7 +326,10 @@ export class FinanceModule extends ModuleBase {
    */
   currency(): Currency {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.finance.currency
+      assertLocaleData(
+        this.faker.fakerCore.locale.finance?.currency,
+        'finance.currency'
+      )
     );
   }
 
@@ -536,7 +549,10 @@ export class FinanceModule extends ModuleBase {
     const { issuer = '' } = options;
 
     let format: string;
-    const localeFormat = this.faker.definitions.finance.credit_card;
+    const localeFormat = assertLocaleData(
+      this.faker.fakerCore.locale.finance?.credit_card,
+      'finance.credit_card'
+    );
     const normalizedIssuer = issuer.toLowerCase();
     if (normalizedIssuer in localeFormat) {
       format = this.faker.helpers.arrayElement(localeFormat[normalizedIssuer]);
@@ -576,7 +592,10 @@ export class FinanceModule extends ModuleBase {
    */
   creditCardIssuer(): string {
     return this.faker.helpers.objectKey(
-      this.faker.definitions.finance.credit_card
+      assertLocaleData(
+        this.faker.fakerCore.locale.finance?.credit_card,
+        'finance.credit_card'
+      )
     ) as string;
   }
 
@@ -852,7 +871,10 @@ export class FinanceModule extends ModuleBase {
    */
   transactionDescription(): string {
     return this.faker.helpers.fake(
-      this.faker.definitions.finance.transaction_description_pattern
+      assertLocaleData(
+        this.faker.fakerCore.locale.finance?.transaction_description_pattern,
+        'finance.transaction_description_pattern'
+      )
     );
   }
 }
diff --git a/src/modules/food/index.ts b/src/modules/food/index.ts
index 8dd77741282..3b8cd3923b5 100644
--- a/src/modules/food/index.ts
+++ b/src/modules/food/index.ts
@@ -1,3 +1,4 @@
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 
 /**
@@ -32,7 +33,10 @@ export class FoodModule extends ModuleBase {
    */
   adjective(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.food.adjective
+      assertLocaleData(
+        this.faker.fakerCore.locale.food?.adjective,
+        'food.adjective'
+      )
     );
   }
 
@@ -46,7 +50,10 @@ export class FoodModule extends ModuleBase {
    */
   description(): string {
     return this.faker.helpers.fake(
-      this.faker.definitions.food.description_pattern
+      assertLocaleData(
+        this.faker.fakerCore.locale.food?.description_pattern,
+        'food.description_pattern'
+      )
     );
   }
 
@@ -62,12 +69,19 @@ export class FoodModule extends ModuleBase {
     // A 50/50 mix of specific dishes and dish_patterns
     if (this.faker.datatype.boolean()) {
       return toTitleCase(
-        this.faker.helpers.fake(this.faker.definitions.food.dish_pattern)
+        this.faker.helpers.fake(
+          assertLocaleData(
+            this.faker.fakerCore.locale.food?.dish_pattern,
+            'food.dish_pattern'
+          )
+        )
       );
     }
 
     return toTitleCase(
-      this.faker.helpers.arrayElement(this.faker.definitions.food.dish)
+      this.faker.helpers.arrayElement(
+        assertLocaleData(this.faker.fakerCore.locale.food?.dish, 'food.dish')
+      )
     );
   }
 
@@ -81,7 +95,10 @@ export class FoodModule extends ModuleBase {
    */
   ethnicCategory(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.food.ethnic_category
+      assertLocaleData(
+        this.faker.fakerCore.locale.food?.ethnic_category,
+        'food.ethnic_category'
+      )
     );
   }
 
@@ -94,7 +111,9 @@ export class FoodModule extends ModuleBase {
    * @since 9.0.0
    */
   fruit(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.food.fruit);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.food?.fruit, 'food.fruit')
+    );
   }
 
   /**
@@ -107,7 +126,10 @@ export class FoodModule extends ModuleBase {
    */
   ingredient(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.food.ingredient
+      assertLocaleData(
+        this.faker.fakerCore.locale.food?.ingredient,
+        'food.ingredient'
+      )
     );
   }
 
@@ -120,7 +142,9 @@ export class FoodModule extends ModuleBase {
    * @since 9.0.0
    */
   meat(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.food.meat);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.food?.meat, 'food.meat')
+    );
   }
 
   /**
@@ -132,7 +156,9 @@ export class FoodModule extends ModuleBase {
    * @since 9.0.0
    */
   spice(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.food.spice);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.food?.spice, 'food.spice')
+    );
   }
 
   /**
@@ -145,7 +171,10 @@ export class FoodModule extends ModuleBase {
    */
   vegetable(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.food.vegetable
+      assertLocaleData(
+        this.faker.fakerCore.locale.food?.vegetable,
+        'food.vegetable'
+      )
     );
   }
 }
diff --git a/src/modules/hacker/index.ts b/src/modules/hacker/index.ts
index 500f2f907c8..f842df32556 100644
--- a/src/modules/hacker/index.ts
+++ b/src/modules/hacker/index.ts
@@ -1,3 +1,4 @@
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 
 /**
@@ -26,7 +27,10 @@ export class HackerModule extends ModuleBase {
    */
   abbreviation(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.hacker.abbreviation
+      assertLocaleData(
+        this.faker.fakerCore.locale.hacker?.abbreviation,
+        'hacker.abbreviation'
+      )
     );
   }
 
@@ -40,7 +44,10 @@ export class HackerModule extends ModuleBase {
    */
   adjective(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.hacker.adjective
+      assertLocaleData(
+        this.faker.fakerCore.locale.hacker?.adjective,
+        'hacker.adjective'
+      )
     );
   }
 
@@ -53,7 +60,9 @@ export class HackerModule extends ModuleBase {
    * @since 2.0.1
    */
   noun(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.hacker.noun);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.hacker?.noun, 'hacker.noun')
+    );
   }
 
   /**
@@ -65,7 +74,9 @@ export class HackerModule extends ModuleBase {
    * @since 2.0.1
    */
   verb(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.hacker.verb);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.hacker?.verb, 'hacker.verb')
+    );
   }
 
   /**
@@ -78,7 +89,10 @@ export class HackerModule extends ModuleBase {
    */
   ingverb(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.hacker.ingverb
+      assertLocaleData(
+        this.faker.fakerCore.locale.hacker?.ingverb,
+        'hacker.ingverb'
+      )
     );
   }
 
@@ -92,6 +106,11 @@ export class HackerModule extends ModuleBase {
    * @since 2.0.1
    */
   phrase(): string {
-    return this.faker.helpers.fake(this.faker.definitions.hacker.phrase);
+    return this.faker.helpers.fake(
+      assertLocaleData(
+        this.faker.fakerCore.locale.hacker?.phrase,
+        'hacker.phrase'
+      )
+    );
   }
 }
diff --git a/src/modules/internet/index.ts b/src/modules/internet/index.ts
index fb95988d32e..ab063b56d67 100644
--- a/src/modules/internet/index.ts
+++ b/src/modules/internet/index.ts
@@ -1,5 +1,6 @@
 import { FakerError } from '../../errors/faker-error';
 import type { Faker } from '../../faker';
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { toBase64Url } from '../../internal/base64';
 import { ModuleBase } from '../../internal/module-base';
 import { charMapping } from './char-mappings';
@@ -197,7 +198,10 @@ export class InternetModule extends ModuleBase {
       firstName,
       lastName,
       provider = this.faker.helpers.arrayElement(
-        this.faker.definitions.internet.free_email
+        assertLocaleData(
+          this.faker.fakerCore.locale.internet?.free_email,
+          'internet.free_email'
+        )
       ),
       allowSpecialCharacters = false,
     } = options;
@@ -272,7 +276,10 @@ export class InternetModule extends ModuleBase {
     const { firstName, lastName, allowSpecialCharacters = false } = options;
 
     const provider = this.faker.helpers.arrayElement(
-      this.faker.definitions.internet.example_email
+      assertLocaleData(
+        this.faker.fakerCore.locale.internet?.example_email,
+        'internet.example_email'
+      )
     );
 
     return this.email({
@@ -492,12 +499,18 @@ export class InternetModule extends ModuleBase {
   ): number {
     const {
       types = Object.keys(
-        this.faker.definitions.internet.http_status_code
+        assertLocaleData(
+          this.faker.fakerCore.locale.internet?.http_status_code,
+          'internet.http_status_code'
+        )
       ) as HTTPStatusCodeType[],
     } = options;
     const httpStatusCodeType = this.faker.helpers.arrayElement(types);
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.internet.http_status_code[httpStatusCodeType]
+      assertLocaleData(
+        this.faker.fakerCore.locale.internet?.http_status_code,
+        'internet.http_status_code'
+      )[httpStatusCodeType]
     );
   }
 
@@ -559,7 +572,10 @@ export class InternetModule extends ModuleBase {
    */
   domainSuffix(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.internet.domain_suffix
+      assertLocaleData(
+        this.faker.fakerCore.locale.internet?.domain_suffix,
+        'internet.domain_suffix'
+      )
     );
   }
 
@@ -737,7 +753,10 @@ export class InternetModule extends ModuleBase {
    */
   userAgent(): string {
     return this.faker.helpers.fake(
-      this.faker.definitions.internet.user_agent_pattern
+      assertLocaleData(
+        this.faker.fakerCore.locale.internet?.user_agent_pattern,
+        'internet.user_agent_pattern'
+      )
     );
   }
 
@@ -946,11 +965,19 @@ export class InternetModule extends ModuleBase {
     } = {}
   ): string {
     const {
-      types = Object.keys(this.faker.definitions.internet.emoji) as EmojiType[],
+      types = Object.keys(
+        assertLocaleData(
+          this.faker.fakerCore.locale.internet?.emoji,
+          'internet.emoji'
+        )
+      ) as EmojiType[],
     } = options;
     const emojiType = this.faker.helpers.arrayElement(types);
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.internet.emoji[emojiType]
+      assertLocaleData(
+        this.faker.fakerCore.locale.internet?.emoji,
+        'internet.emoji'
+      )[emojiType]
     );
   }
 
@@ -967,7 +994,10 @@ export class InternetModule extends ModuleBase {
    */
   jwtAlgorithm(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.internet.jwt_algorithm
+      assertLocaleData(
+        this.faker.fakerCore.locale.internet?.jwt_algorithm,
+        'internet.jwt_algorithm'
+      )
     );
   }
 
diff --git a/src/modules/location/index.ts b/src/modules/location/index.ts
index 98bd7879c6c..2556d2d4da1 100644
--- a/src/modules/location/index.ts
+++ b/src/modules/location/index.ts
@@ -1,5 +1,6 @@
 import { FakerError } from '../../errors/faker-error';
 import type { Faker } from '../../faker';
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { SimpleModuleBase } from '../../internal/module-base';
 
 /**
@@ -256,8 +257,10 @@ export class LocationModule extends SimpleLocationModule {
     const { state } = options;
 
     if (state != null) {
-      const zipPattern =
-        this.faker.definitions.location.postcode_by_state[state];
+      const zipPattern = assertLocaleData(
+        this.faker.fakerCore.locale.location?.postcode_by_state,
+        'location.postcode_by_state'
+      )[state];
 
       if (zipPattern == null) {
         throw new FakerError(
@@ -268,7 +271,12 @@ export class LocationModule extends SimpleLocationModule {
       return this.faker.helpers.fake(zipPattern);
     }
 
-    let { format = this.faker.definitions.location.postcode } = options;
+    let {
+      format = assertLocaleData(
+        this.faker.fakerCore.locale.location?.postcode,
+        'location.postcode'
+      ),
+    } = options;
     if (typeof format === 'string') {
       format = [format];
     }
@@ -289,7 +297,10 @@ export class LocationModule extends SimpleLocationModule {
    */
   city(): string {
     return this.faker.helpers.fake(
-      this.faker.definitions.location.city_pattern
+      assertLocaleData(
+        this.faker.fakerCore.locale.location?.city_pattern,
+        'location.city_pattern'
+      )
     );
   }
 
@@ -303,7 +314,12 @@ export class LocationModule extends SimpleLocationModule {
    */
   buildingNumber(): string {
     return this.faker.helpers
-      .arrayElement(this.faker.definitions.location.building_number)
+      .arrayElement(
+        assertLocaleData(
+          this.faker.fakerCore.locale.location?.building_number,
+          'location.building_number'
+        )
+      )
       .replaceAll(/#+/g, (m) =>
         this.faker.string.numeric({
           length: m.length,
@@ -322,7 +338,10 @@ export class LocationModule extends SimpleLocationModule {
    */
   street(): string {
     return this.faker.helpers.fake(
-      this.faker.definitions.location.street_pattern
+      assertLocaleData(
+        this.faker.fakerCore.locale.location?.street_pattern,
+        'location.street_pattern'
+      )
     );
   }
 
@@ -358,7 +377,10 @@ export class LocationModule extends SimpleLocationModule {
 
     const { useFullAddress } = options;
 
-    const formats = this.faker.definitions.location.street_address;
+    const formats = assertLocaleData(
+      this.faker.fakerCore.locale.location?.street_address,
+      'location.street_address'
+    );
     const format = formats[useFullAddress ? 'full' : 'normal'];
 
     return this.faker.helpers.fake(format);
@@ -392,7 +414,10 @@ export class LocationModule extends SimpleLocationModule {
    */
   postalAddress(): string {
     return this.faker.helpers.fake(
-      this.faker.definitions.location.postal_address
+      assertLocaleData(
+        this.faker.fakerCore.locale.location?.postal_address,
+        'location.postal_address'
+      )
     );
   }
 
@@ -407,7 +432,12 @@ export class LocationModule extends SimpleLocationModule {
    */
   secondaryAddress(): string {
     return this.faker.helpers
-      .fake(this.faker.definitions.location.secondary_address)
+      .fake(
+        assertLocaleData(
+          this.faker.fakerCore.locale.location?.secondary_address,
+          'location.secondary_address'
+        )
+      )
       .replaceAll(/#+/g, (m) =>
         this.faker.string.numeric({
           length: m.length,
@@ -427,7 +457,10 @@ export class LocationModule extends SimpleLocationModule {
    */
   county(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.location.county
+      assertLocaleData(
+        this.faker.fakerCore.locale.location?.county,
+        'location.county'
+      )
     );
   }
 
@@ -441,7 +474,10 @@ export class LocationModule extends SimpleLocationModule {
    */
   country(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.location.country
+      assertLocaleData(
+        this.faker.fakerCore.locale.location?.country,
+        'location.country'
+      )
     );
   }
 
@@ -455,7 +491,10 @@ export class LocationModule extends SimpleLocationModule {
    */
   continent(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.location.continent
+      assertLocaleData(
+        this.faker.fakerCore.locale.location?.continent,
+        'location.continent'
+      )
     );
   }
 
@@ -518,7 +557,10 @@ export class LocationModule extends SimpleLocationModule {
     })();
 
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.location.country_code
+      assertLocaleData(
+        this.faker.fakerCore.locale.location?.country_code,
+        'location.country_code'
+      )
     )[key];
   }
 
@@ -553,8 +595,14 @@ export class LocationModule extends SimpleLocationModule {
   ): string {
     const { abbreviated = false } = options;
     const data = abbreviated
-      ? this.faker.definitions.location.state_abbr
-      : this.faker.definitions.location.state;
+      ? assertLocaleData(
+          this.faker.fakerCore.locale.location?.state_abbr,
+          'location.state_abbr'
+        )
+      : assertLocaleData(
+          this.faker.fakerCore.locale.location?.state,
+          'location.state'
+        );
 
     return this.faker.helpers.arrayElement(data);
   }
@@ -584,7 +632,10 @@ export class LocationModule extends SimpleLocationModule {
     } = {}
   ): string {
     const { abbreviated = false } = options;
-    const direction = this.faker.definitions.location.direction;
+    const direction = assertLocaleData(
+      this.faker.fakerCore.locale.location?.direction,
+      'location.direction'
+    );
     const data = abbreviated
       ? [...direction.cardinal_abbr, ...direction.ordinal_abbr]
       : [...direction.cardinal, ...direction.ordinal];
@@ -617,7 +668,10 @@ export class LocationModule extends SimpleLocationModule {
     } = {}
   ): string {
     const { abbreviated = false } = options;
-    const direction = this.faker.definitions.location.direction;
+    const direction = assertLocaleData(
+      this.faker.fakerCore.locale.location?.direction,
+      'location.direction'
+    );
     const data = abbreviated ? direction.cardinal_abbr : direction.cardinal;
 
     return this.faker.helpers.arrayElement(data);
@@ -648,7 +702,10 @@ export class LocationModule extends SimpleLocationModule {
     } = {}
   ): string {
     const { abbreviated = false } = options;
-    const direction = this.faker.definitions.location.direction;
+    const direction = assertLocaleData(
+      this.faker.fakerCore.locale.location?.direction,
+      'location.direction'
+    );
     const data = abbreviated ? direction.ordinal_abbr : direction.ordinal;
 
     return this.faker.helpers.arrayElement(data);
@@ -669,7 +726,10 @@ export class LocationModule extends SimpleLocationModule {
    */
   timeZone(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.location.time_zone
+      assertLocaleData(
+        this.faker.fakerCore.locale.location?.time_zone,
+        'location.time_zone'
+      )
     );
   }
 
@@ -690,7 +750,10 @@ export class LocationModule extends SimpleLocationModule {
    */
   language(): Language {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.location.language
+      assertLocaleData(
+        this.faker.fakerCore.locale.location?.language,
+        'location.language'
+      )
     );
   }
 }
diff --git a/src/modules/lorem/index.ts b/src/modules/lorem/index.ts
index 880fb1a61c6..8b83ed33d96 100644
--- a/src/modules/lorem/index.ts
+++ b/src/modules/lorem/index.ts
@@ -1,3 +1,4 @@
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 import { filterWordListByLength } from '../word/filter-word-list-by-length';
 
@@ -82,7 +83,10 @@ export class LoremModule extends ModuleBase {
     return this.faker.helpers.arrayElement(
       filterWordListByLength({
         ...options,
-        wordList: this.faker.definitions.lorem.word,
+        wordList: assertLocaleData(
+          this.faker.fakerCore.locale.lorem?.word,
+          'lorem.word'
+        ),
       })
     );
   }
diff --git a/src/modules/music/index.ts b/src/modules/music/index.ts
index e3d56715b1c..1a0bcbe107f 100644
--- a/src/modules/music/index.ts
+++ b/src/modules/music/index.ts
@@ -1,3 +1,4 @@
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 
 /**
@@ -27,7 +28,9 @@ export class MusicModule extends ModuleBase {
    * @since 9.0.0
    */
   album(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.music.album);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.music?.album, 'music.album')
+    );
   }
 
   /**
@@ -39,7 +42,12 @@ export class MusicModule extends ModuleBase {
    * @since 9.0.0
    */
   artist(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.music.artist);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(
+        this.faker.fakerCore.locale.music?.artist,
+        'music.artist'
+      )
+    );
   }
 
   /**
@@ -51,7 +59,9 @@ export class MusicModule extends ModuleBase {
    * @since 5.2.0
    */
   genre(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.music.genre);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.music?.genre, 'music.genre')
+    );
   }
 
   /**
@@ -64,7 +74,10 @@ export class MusicModule extends ModuleBase {
    */
   songName(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.music.song_name
+      assertLocaleData(
+        this.faker.fakerCore.locale.music?.song_name,
+        'music.song_name'
+      )
     );
   }
 }
diff --git a/src/modules/person/index.ts b/src/modules/person/index.ts
index 0b905632d1d..de28115a865 100644
--- a/src/modules/person/index.ts
+++ b/src/modules/person/index.ts
@@ -1,5 +1,6 @@
 import type { PersonEntryDefinition } from '../../definitions/person';
 import type { Faker } from '../../faker';
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 
 /**
@@ -118,7 +119,10 @@ export class PersonModule extends ModuleBase {
       selectDefinition(
         this.faker,
         sex,
-        this.faker.definitions.person.first_name
+        assertLocaleData(
+          this.faker.fakerCore.locale.person?.first_name,
+          'person.first_name'
+        )
       )
     );
   }
@@ -146,7 +150,14 @@ export class PersonModule extends ModuleBase {
     }
 
     return this.faker.helpers.arrayElement(
-      selectDefinition(this.faker, sex, this.faker.definitions.person.last_name)
+      selectDefinition(
+        this.faker,
+        sex,
+        assertLocaleData(
+          this.faker.fakerCore.locale.person?.last_name,
+          'person.last_name'
+        )
+      )
     );
   }
 
@@ -168,7 +179,10 @@ export class PersonModule extends ModuleBase {
       selectDefinition(
         this.faker,
         sex,
-        this.faker.definitions.person.middle_name
+        assertLocaleData(
+          this.faker.fakerCore.locale.person?.middle_name,
+          'person.middle_name'
+        )
       )
     );
   }
@@ -219,7 +233,7 @@ export class PersonModule extends ModuleBase {
     } = options;
 
     const fullNamePattern: string = this.faker.helpers.weightedArrayElement(
-      this.faker.definitions.person.name
+      assertLocaleData(this.faker.fakerCore.locale.person?.name, 'person.name')
     );
 
     const fullName = this.faker.helpers.mustache(fullNamePattern, {
@@ -244,7 +258,10 @@ export class PersonModule extends ModuleBase {
    */
   gender(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.person.gender
+      assertLocaleData(
+        this.faker.fakerCore.locale.person?.gender,
+        'person.gender'
+      )
     );
   }
 
@@ -263,7 +280,9 @@ export class PersonModule extends ModuleBase {
    * @since 8.0.0
    */
   sex(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.person.sex);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(this.faker.fakerCore.locale.person?.sex, 'person.sex')
+    );
   }
 
   /**
@@ -312,7 +331,12 @@ export class PersonModule extends ModuleBase {
    * @since 8.0.0
    */
   bio(): string {
-    return this.faker.helpers.fake(this.faker.definitions.person.bio_pattern);
+    return this.faker.helpers.fake(
+      assertLocaleData(
+        this.faker.fakerCore.locale.person?.bio_pattern,
+        'person.bio_pattern'
+      )
+    );
   }
 
   /**
@@ -329,7 +353,14 @@ export class PersonModule extends ModuleBase {
    */
   prefix(sex?: SexType): string {
     return this.faker.helpers.arrayElement(
-      selectDefinition(this.faker, sex, this.faker.definitions.person.prefix)
+      selectDefinition(
+        this.faker,
+        sex,
+        assertLocaleData(
+          this.faker.fakerCore.locale.person?.prefix,
+          'person.prefix'
+        )
+      )
     );
   }
 
@@ -344,7 +375,10 @@ export class PersonModule extends ModuleBase {
   suffix(): string {
     // TODO @Shinigami92 2022-03-21: Add female_suffix and male_suffix
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.person.suffix
+      assertLocaleData(
+        this.faker.fakerCore.locale.person?.suffix,
+        'person.suffix'
+      )
     );
   }
 
@@ -358,7 +392,10 @@ export class PersonModule extends ModuleBase {
    */
   jobTitle(): string {
     return this.faker.helpers.fake(
-      this.faker.definitions.person.job_title_pattern
+      assertLocaleData(
+        this.faker.fakerCore.locale.person?.job_title_pattern,
+        'person.job_title_pattern'
+      )
     );
   }
 
@@ -372,7 +409,10 @@ export class PersonModule extends ModuleBase {
    */
   jobDescriptor(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.person.job_descriptor
+      assertLocaleData(
+        this.faker.fakerCore.locale.person?.job_descriptor,
+        'person.job_descriptor'
+      )
     );
   }
 
@@ -386,7 +426,10 @@ export class PersonModule extends ModuleBase {
    */
   jobArea(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.person.job_area
+      assertLocaleData(
+        this.faker.fakerCore.locale.person?.job_area,
+        'person.job_area'
+      )
     );
   }
 
@@ -400,7 +443,10 @@ export class PersonModule extends ModuleBase {
    */
   jobType(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.person.job_type
+      assertLocaleData(
+        this.faker.fakerCore.locale.person?.job_type,
+        'person.job_type'
+      )
     );
   }
 
@@ -414,7 +460,10 @@ export class PersonModule extends ModuleBase {
    */
   zodiacSign(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.person.western_zodiac_sign
+      assertLocaleData(
+        this.faker.fakerCore.locale.person?.western_zodiac_sign,
+        'person.western_zodiac_sign'
+      )
     );
   }
 }
diff --git a/src/modules/phone/index.ts b/src/modules/phone/index.ts
index c55bfeed6e7..0a5f2a7cc91 100644
--- a/src/modules/phone/index.ts
+++ b/src/modules/phone/index.ts
@@ -1,3 +1,4 @@
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 import { legacyReplaceSymbolWithNumber } from '../helpers';
 
@@ -42,7 +43,10 @@ export class PhoneModule extends ModuleBase {
     } = {}
   ): string {
     const { style = 'human' } = options;
-    const formats = this.faker.definitions.phone_number.format;
+    const formats = assertLocaleData(
+      this.faker.fakerCore.locale.phone_number?.format,
+      'phone_number.format'
+    );
 
     const definitions = formats[style];
     if (!definitions) {
diff --git a/src/modules/science/index.ts b/src/modules/science/index.ts
index 525ff8bf0cc..6d9ea67a2e0 100644
--- a/src/modules/science/index.ts
+++ b/src/modules/science/index.ts
@@ -1,3 +1,4 @@
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 
 /**
@@ -49,7 +50,10 @@ export class ScienceModule extends ModuleBase {
    */
   chemicalElement(): ChemicalElement {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.science.chemical_element
+      assertLocaleData(
+        this.faker.fakerCore.locale.science?.chemical_element,
+        'science.chemical_element'
+      )
     );
   }
 
@@ -64,6 +68,11 @@ export class ScienceModule extends ModuleBase {
    * @since 7.2.0
    */
   unit(): Unit {
-    return this.faker.helpers.arrayElement(this.faker.definitions.science.unit);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(
+        this.faker.fakerCore.locale.science?.unit,
+        'science.unit'
+      )
+    );
   }
 }
diff --git a/src/modules/system/index.ts b/src/modules/system/index.ts
index cfa9c04e6b6..d4b26736e78 100644
--- a/src/modules/system/index.ts
+++ b/src/modules/system/index.ts
@@ -1,3 +1,4 @@
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 
 const commonFileTypes = ['video', 'audio', 'image', 'text', 'application'];
@@ -114,7 +115,12 @@ export class SystemModule extends ModuleBase {
    * @since 3.1.0
    */
   mimeType(): string {
-    const mimeTypeKeys = Object.keys(this.faker.definitions.system.mime_type);
+    const mimeTypeKeys = Object.keys(
+      assertLocaleData(
+        this.faker.fakerCore.locale.system?.mime_type,
+        'system.mime_type'
+      )
+    );
 
     return this.faker.helpers.arrayElement(mimeTypeKeys);
   }
@@ -152,7 +158,10 @@ export class SystemModule extends ModuleBase {
    * @since 3.1.0
    */
   fileType(): string {
-    const mimeTypes = this.faker.definitions.system.mime_type;
+    const mimeTypes = assertLocaleData(
+      this.faker.fakerCore.locale.system?.mime_type,
+      'system.mime_type'
+    );
 
     const typeSet = new Set(
       Object.keys(mimeTypes).map((key) => key.split('/')[0])
@@ -172,7 +181,10 @@ export class SystemModule extends ModuleBase {
    * @since 3.1.0
    */
   fileExt(mimeType?: string): string {
-    const mimeTypes = this.faker.definitions.system.mime_type;
+    const mimeTypes = assertLocaleData(
+      this.faker.fakerCore.locale.system?.mime_type,
+      'system.mime_type'
+    );
 
     if (typeof mimeType === 'string') {
       return this.faker.helpers.arrayElement(mimeTypes[mimeType].extensions);
@@ -193,7 +205,10 @@ export class SystemModule extends ModuleBase {
    * @since 3.1.0
    */
   directoryPath(): string {
-    const paths = this.faker.definitions.system.directory_path;
+    const paths = assertLocaleData(
+      this.faker.fakerCore.locale.system?.directory_path,
+      'system.directory_path'
+    );
     return this.faker.helpers.arrayElement(paths);
   }
 
diff --git a/src/modules/vehicle/index.ts b/src/modules/vehicle/index.ts
index d032465a42d..616ebf1ded0 100644
--- a/src/modules/vehicle/index.ts
+++ b/src/modules/vehicle/index.ts
@@ -1,3 +1,4 @@
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 
 /**
@@ -32,7 +33,10 @@ export class VehicleModule extends ModuleBase {
    */
   manufacturer(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.vehicle.manufacturer
+      assertLocaleData(
+        this.faker.fakerCore.locale.vehicle?.manufacturer,
+        'vehicle.manufacturer'
+      )
     );
   }
 
@@ -46,7 +50,10 @@ export class VehicleModule extends ModuleBase {
    */
   model(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.vehicle.model
+      assertLocaleData(
+        this.faker.fakerCore.locale.vehicle?.model,
+        'vehicle.model'
+      )
     );
   }
 
@@ -59,7 +66,12 @@ export class VehicleModule extends ModuleBase {
    * @since 5.0.0
    */
   type(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.vehicle.type);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(
+        this.faker.fakerCore.locale.vehicle?.type,
+        'vehicle.type'
+      )
+    );
   }
 
   /**
@@ -71,7 +83,12 @@ export class VehicleModule extends ModuleBase {
    * @since 5.0.0
    */
   fuel(): string {
-    return this.faker.helpers.arrayElement(this.faker.definitions.vehicle.fuel);
+    return this.faker.helpers.arrayElement(
+      assertLocaleData(
+        this.faker.fakerCore.locale.vehicle?.fuel,
+        'vehicle.fuel'
+      )
+    );
   }
 
   /**
@@ -142,7 +159,10 @@ export class VehicleModule extends ModuleBase {
    */
   bicycle(): string {
     return this.faker.helpers.arrayElement(
-      this.faker.definitions.vehicle.bicycle_type
+      assertLocaleData(
+        this.faker.fakerCore.locale.vehicle?.bicycle_type,
+        'vehicle.bicycle_type'
+      )
     );
   }
 }
diff --git a/src/modules/word/index.ts b/src/modules/word/index.ts
index cf5719b23d6..e7a868a563b 100644
--- a/src/modules/word/index.ts
+++ b/src/modules/word/index.ts
@@ -1,4 +1,5 @@
 import { FakerError } from '../../errors/faker-error';
+import { assertLocaleData } from '../../internal/assert-locale-data';
 import { ModuleBase } from '../../internal/module-base';
 import { filterWordListByLength } from './filter-word-list-by-length';
 
@@ -73,7 +74,10 @@ export class WordModule extends ModuleBase {
     return this.faker.helpers.arrayElement(
       filterWordListByLength({
         ...options,
-        wordList: this.faker.definitions.word.adjective,
+        wordList: assertLocaleData(
+          this.faker.fakerCore.locale.word?.adjective,
+          'word.adjective'
+        ),
       })
     );
   }
@@ -145,7 +149,10 @@ export class WordModule extends ModuleBase {
     return this.faker.helpers.arrayElement(
       filterWordListByLength({
         ...options,
-        wordList: this.faker.definitions.word.adverb,
+        wordList: assertLocaleData(
+          this.faker.fakerCore.locale.word?.adverb,
+          'word.adverb'
+        ),
       })
     );
   }
@@ -217,7 +224,10 @@ export class WordModule extends ModuleBase {
     return this.faker.helpers.arrayElement(
       filterWordListByLength({
         ...options,
-        wordList: this.faker.definitions.word.conjunction,
+        wordList: assertLocaleData(
+          this.faker.fakerCore.locale.word?.conjunction,
+          'word.conjunction'
+        ),
       })
     );
   }
@@ -289,7 +299,10 @@ export class WordModule extends ModuleBase {
     return this.faker.helpers.arrayElement(
       filterWordListByLength({
         ...options,
-        wordList: this.faker.definitions.word.interjection,
+        wordList: assertLocaleData(
+          this.faker.fakerCore.locale.word?.interjection,
+          'word.interjection'
+        ),
       })
     );
   }
@@ -361,7 +374,10 @@ export class WordModule extends ModuleBase {
     return this.faker.helpers.arrayElement(
       filterWordListByLength({
         ...options,
-        wordList: this.faker.definitions.word.noun,
+        wordList: assertLocaleData(
+          this.faker.fakerCore.locale.word?.noun,
+          'word.noun'
+        ),
       })
     );
   }
@@ -433,7 +449,10 @@ export class WordModule extends ModuleBase {
     return this.faker.helpers.arrayElement(
       filterWordListByLength({
         ...options,
-        wordList: this.faker.definitions.word.preposition,
+        wordList: assertLocaleData(
+          this.faker.fakerCore.locale.word?.preposition,
+          'word.preposition'
+        ),
       })
     );
   }
@@ -505,7 +524,10 @@ export class WordModule extends ModuleBase {
     return this.faker.helpers.arrayElement(
       filterWordListByLength({
         ...options,
-        wordList: this.faker.definitions.word.verb,
+        wordList: assertLocaleData(
+          this.faker.fakerCore.locale.word?.verb,
+          'word.verb'
+        ),
       })
     );
   }