ckeditor · Mati365 · Jul 21, 2026 · Jul 21, 2026 · Jul 21, 2026 · Jul 21, 2026
diff --git a/.changelog/20260721132553_ck_10480.md b/.changelog/20260721132553_ck_10480.md
@@ -0,0 +1,9 @@
+---
+type: Major breaking change
+scope:
+  - ckeditor5-dev-translations
+see:
+  - https://github.com/ckeditor/ckeditor5-commercial/issues/10480
+---
+
+The `zh_TW` language code is no longer mapped to the `zh.po` file. It now emits `zh-tw.po` instead.
diff --git a/packages/ckeditor5-dev-translations/lib/utils/getlanguages.js b/packages/ckeditor5-dev-translations/lib/utils/getlanguages.js
@@ -78,12 +78,10 @@ const SUPPORTED_LOCALES = [
 	'uz', // Uzbek
 	'vi' // Vietnamese
 ];
-
 const LOCALES_FILENAME_MAP = {
 	'ne_NP': 'ne',
 	'si_LK': 'si',
-	'sr@latin': 'sr-latn',
-	'zh_TW': 'zh'
+	'sr@latin': 'sr-latn'
 };
 
 /**

diff --git a/packages/ckeditor5-dev-translations/tests/utils/getlanguages.js b/packages/ckeditor5-dev-translations/tests/utils/getlanguages.js
@@ -61,7 +61,7 @@ describe( 'getLanguages()', () => {
 
 		expect( languageChineseTaiwan ).toEqual( {
 			localeCode: 'zh_TW',
-			languageCode: 'zh',
+			languageCode: 'zh-tw',
 			languageFileName: 'zh'
 		} );
 	} );