First draft of Korean Cardinal ITN

Sparrowhawk testing is not done yet.

Signed-off-by: hmlee245 <hmlee245@gmail.com>

Author: hmlee245

nemo_text_processing/inverse_text_normalization/inverse_normalize.py

@@ -131,6 +131,11 @@ def __init__(
             from nemo_text_processing.inverse_text_normalization.ja.verbalizers.verbalize_final import (
                 VerbalizeFinalFst,
             )
+        elif lang == 'ko':  # Korean
+            from nemo_text_processing.inverse_text_normalization.ko.taggers.tokenize_and_classify import ClassifyFst
+            from nemo_text_processing.inverse_text_normalization.ko.verbalizers.verbalize_final import (
+                VerbalizeFinalFst,
+            )    
 
         self.tagger = ClassifyFst(
             cache_dir=cache_dir, whitelist=whitelist, overwrite_cache=overwrite_cache, input_case=input_case
@@ -175,7 +180,7 @@ def parse_args():
     parser.add_argument(
         "--language",
         help="language",
-        choices=['en', 'de', 'es', 'pt', 'ru', 'fr', 'sv', 'vi', 'ar', 'es_en', 'zh', 'hi', 'hy', 'mr', 'ja'],
+        choices=['en', 'de', 'es', 'pt', 'ru', 'fr', 'sv', 'vi', 'ar', 'es_en', 'zh', 'hi', 'hy', 'mr', 'ja','ko'],
         default="en",
         type=str,
     )

nemo_text_processing/inverse_text_normalization/ko/__init__.py

@@ -0,0 +1,17 @@
+# Copyright (c) 2025, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from nemo_text_processing.inverse_text_normalization.ko.taggers.tokenize_and_classify import ClassifyFst
+from nemo_text_processing.inverse_text_normalization.ko.verbalizers.verbalize import VerbalizeFst
+from nemo_text_processing.inverse_text_normalization.ko.verbalizers.verbalize_final import VerbalizeFinalFst