feat: Add new language codes

Author: Lucas Mathis

CHANGELOG.md

@@ -5,6 +5,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- Added new language constants from January 2026 API release of 81 new languages.
+
 ### Changed
 - Removed Node 12 from the CI as it broke and is end-of-life.
 - Updated our model type tests to expect the `model_type_used` to be populated when the `model_type` is specified in the request

src/types.ts

@@ -228,37 +228,118 @@ export interface DocumentTranslateOptions extends BaseRequestOptions {
  * API accept case-insensitive language codes.
  */
 type CommonLanguageCode =
+    | 'ace'
+    | 'af'
+    | 'an'
     | 'ar'
+    | 'as'
+    | 'ay'
+    | 'az'
+    | 'ba'
+    | 'be'
     | 'bg'
+    | 'bho'
+    | 'bn'
+    | 'br'
+    | 'bs'
+    | 'ca'
+    | 'ceb'
+    | 'ckb'
     | 'cs'
+    | 'cy'
     | 'da'
     | 'de'
     | 'el'
+    | 'eo'
     | 'es'
     | 'et'
+    | 'eu'
+    | 'fa'
     | 'fi'
     | 'fr'
+    | 'ga'
+    | 'gl'
+    | 'gn'
+    | 'gom'
+    | 'gu'
+    | 'ha'
     | 'he'
+    | 'hi'
+    | 'hr'
+    | 'ht'
     | 'hu'
+    | 'hy'
     | 'id'
+    | 'ig'
+    | 'is'
     | 'it'
     | 'ja'
+    | 'jv'
+    | 'ka'
+    | 'kk'
+    | 'kmr'
     | 'ko'
+    | 'ky'
+    | 'la'
+    | 'lb'
+    | 'lmo'
+    | 'ln'
     | 'lt'
     | 'lv'
+    | 'mai'
+    | 'mg'
+    | 'mi'
+    | 'mk'
+    | 'ml'
+    | 'mn'
+    | 'mr'
+    | 'ms'
+    | 'mt'
+    | 'my'
     | 'nb'
+    | 'ne'
     | 'nl'
+    | 'oc'
+    | 'om'
+    | 'pa'
+    | 'pag'
+    | 'pam'
     | 'pl'
+    | 'prs'
+    | 'ps'
+    | 'qu'
     | 'ro'
     | 'ru'
+    | 'sa'
+    | 'scn'
     | 'sk'
     | 'sl'
+    | 'sq'
+    | 'sr'
+    | 'st'
+    | 'su'
     | 'sv'
+    | 'sw'
+    | 'ta'
+    | 'te'
+    | 'tg'
     | 'th'
+    | 'tk'
+    | 'tl'
+    | 'tn'
     | 'tr'
+    | 'ts'
+    | 'tt'
     | 'uk'
+    | 'ur'
+    | 'uz'
     | 'vi'
-    | 'zh';
+    | 'wo'
+    | 'xh'
+    | 'yi'
+    | 'yue'
+    | 'zh'
+    | 'zu';
 
 /**
  * Language codes that may be used as a source language.
@@ -276,6 +357,7 @@ export type TargetLanguageCode =
     | CommonLanguageCode
     | 'en-GB'
     | 'en-US'
+    | 'es-419'
     | 'pt-BR'
     | 'pt-PT'
     | 'zh-HANS'