diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9ace046..dc6bd85 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,16 @@ number is used only for corrections to the OpenAPI specification, for example:
 typos, schema fixes, or adding examples.
 
 
+## [Unreleased]
+### Changed
+* The Chinese language codes returned in the `/languages` response for target
+  languages were changed. While previously only `ZH` "Chinese (simplified)" was 
+  included, `ZH-HANS` "Chinese (simplified)" is now listed too.
+  Both language codes are supported for text and document translation. 
+### Deprecated
+* The target language code `ZH` is deprecated; instead `ZH-HANS` should be used.
+ 
+
 ## [2.15.0] - 2024-07-03
 ### Added
 * Add supported glossary language: Romanian (`ro`).
@@ -141,6 +151,7 @@ typos, schema fixes, or adding examples.
 Initial release of the OpenAPI specification.
 
 
+[Unreleased]: https://github.com/DeepLcom/openapi/compare/v2.15.0...HEAD
 [2.15.0]: https://github.com/DeepLcom/openapi/compare/v2.14.1...v2.15.0
 [2.14.1]: https://github.com/DeepLcom/openapi/compare/v2.14.0...v2.14.1
 [2.14.0]: https://github.com/DeepLcom/openapi/compare/v2.13.0...v2.14.0
diff --git a/openapi.json b/openapi.json
index 2141641..bf16bfe 100644
--- a/openapi.json
+++ b/openapi.json
@@ -35,7 +35,7 @@
     },
     {
       "name": "ManageGlossaries",
-      "description": "The *glossary* functions allow you to create, inspect, and delete glossaries.\nGlossaries created with the glossary function can be used in translate requests by specifying the\n`glossary_id` parameter.\nIf you encounter issues, please let us know at support@DeepL.com.\n\nThe DeepL API supports glossaries in any combination of two languages from the following list, enabling a total of\n120 possible glossary language pairs:\n\n- DA (Danish)\n- DE (German)\n- EN (English)\n- ES (Spanish)\n- FR (French)\n- IT (Italian)\n- JA (Japanese)\n- KO (Korean)\n- NB (Norwegian (bokm\u00e5l))\n- NL (Dutch)\n- PL (Polish)\n- PT (Portuguese)\n- RO (Romanian)\n- RU (Russian)\n- SV (Swedish)\n- ZH (Chinese)\n\nThe maximum size limit for a glossary is 10 MiB = 10485760 bytes and each source/target text,\nas well as the name of the glossary, is limited to 1024 UTF-8 bytes.\nA total of 1000 glossaries are allowed per account.\n\nWhen creating a glossary with target language `EN`, `PT`, or `ZH`, it's not necessary to specify a variant\n(e.g. `EN-US`, `EN-GB`, `PT-PT`, `PT-BR`, or `ZH-HANT`).\nGlossaries with target language `EN` can be used in translations with either English variant.\nSimilarly `PT`, and `ZH` glossaries can be used in translations with their corresponding variants.\n\n\nGlossaries created via the DeepL API are distinct from glossaries created via the DeepL website and DeepL apps.\nThis means API glossaries cannot be used on the website and vice versa.\n\n\n\nNote that glossaries are immutable: once created, the glossary entries for a given glossary ID cannot be modified.\n\nAs a workaround for effectively editable glossaries, we suggest to identify glossaries by name instead of ID in your application\nand then use the following procedure for modifications:\n- [download](https://www.deepl.com/docs-api/glossaries/get-glossary-entries) and store the current glossary's entries,\n- locally modify the glossary entries,\n- [delete](https://www.deepl.com/docs-api/glossaries/delete-glossary) the existing glossary,\n- [create a new glossary](https://www.deepl.com/docs-api/glossaries/create-glossary) with the same name."
+      "description": "The *glossary* functions allow you to create, inspect, and delete glossaries.\nGlossaries created with the glossary function can be used in translate requests by specifying the\n`glossary_id` parameter.\nIf you encounter issues, please let us know at support@DeepL.com.\n\nThe DeepL API supports glossaries in any combination of two languages from the following list, enabling a total of\n120 possible glossary language pairs:\n\n- DA (Danish)\n- DE (German)\n- EN (English)\n- ES (Spanish)\n- FR (French)\n- IT (Italian)\n- JA (Japanese)\n- KO (Korean)\n- NB (Norwegian (bokm\u00e5l))\n- NL (Dutch)\n- PL (Polish)\n- PT (Portuguese)\n- RO (Romanian)\n- RU (Russian)\n- SV (Swedish)\n- ZH (Chinese)\n\nThe maximum size limit for a glossary is 10 MiB = 10485760 bytes and each source/target text,\nas well as the name of the glossary, is limited to 1024 UTF-8 bytes.\nA total of 1000 glossaries are allowed per account.\n\nWhen creating a glossary with target language `EN`, `PT`, or `ZH`, it's not necessary to specify a variant\n(e.g. `EN-US`, `EN-GB`, `PT-PT`, `PT-BR`, or `ZH-HANS`).\nGlossaries with target language `EN` can be used in translations with either English variant.\nSimilarly `PT`, and `ZH` glossaries can be used in translations with their corresponding variants.\n\n\nGlossaries created via the DeepL API are distinct from glossaries created via the DeepL website and DeepL apps.\nThis means API glossaries cannot be used on the website and vice versa.\n\n\n\nNote that glossaries are immutable: once created, the glossary entries for a given glossary ID cannot be modified.\n\nAs a workaround for effectively editable glossaries, we suggest to identify glossaries by name instead of ID in your application\nand then use the following procedure for modifications:\n- [download](https://www.deepl.com/docs-api/glossaries/get-glossary-entries) and store the current glossary's entries,\n- locally modify the glossary entries,\n- [delete](https://www.deepl.com/docs-api/glossaries/delete-glossary) the existing glossary,\n- [create a new glossary](https://www.deepl.com/docs-api/glossaries/create-glossary) with the same name."
     },
     {
       "name": "MetaInformation",
@@ -1467,6 +1467,11 @@
                     "name": "Ukrainian",
                     "supports_formality": false
                   },
+                  {
+                    "language": "ZH",
+                    "name": "Chinese (simplified)",
+                    "supports_formality": false
+                  },
                   {
                     "language": "ZH-HANS",
                     "name": "Chinese (simplified)",
diff --git a/openapi.yaml b/openapi.yaml
index 9779753..0c6d503 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -78,7 +78,7 @@ tags:
     A total of 1000 glossaries are allowed per account.
 
     When creating a glossary with target language `EN`, `PT`, or `ZH`, it's not necessary to specify a variant
-    (e.g. `EN-US`, `EN-GB`, `PT-PT`, `PT-BR`, or `ZH-HANT`).
+    (e.g. `EN-US`, `EN-GB`, `PT-PT`, `PT-BR`, or `ZH-HANS`).
     Glossaries with target language `EN` can be used in translations with either English variant.
     Similarly `PT`, and `ZH` glossaries can be used in translations with their corresponding variants.
 
@@ -1134,6 +1134,9 @@ paths:
               - language: UK
                 name: Ukrainian
                 supports_formality: false
+              - language: ZH
+                name: Chinese (simplified)
+                supports_formality: false
               - language: ZH-HANS
                 name: Chinese (simplified)
                 supports_formality: false
diff --git a/openapi_gitbook.yaml b/openapi_gitbook.yaml
index 4661c2e..9c46b39 100644
--- a/openapi_gitbook.yaml
+++ b/openapi_gitbook.yaml
@@ -1018,6 +1018,9 @@ paths:
               - language: UK
                 name: Ukrainian
                 supports_formality: false
+              - language: ZH
+                name: Chinese (simplified)
+                supports_formality: false
               - language: ZH-HANS
                 name: Chinese (simplified)
                 supports_formality: false
@@ -1509,5 +1512,6 @@ components:
       - SV
       - TR
       - UK
+      - ZH
       - ZH-HANS
       example: DE