Languages supported

The DeepL API supports the following languages. We will update this list as we introduce new languages.

Please note that Hebrew, Thai and Vietnamese have not been added to the /languages endpoint as they are only available in text translation (/translate). When these languages are available for document translation as well they will be added to the /languages endpoint and this note will be removed.

Translation source languages

• AR - Arabic

• BG - Bulgarian

• CS - Czech

• DA - Danish

• DE - German

• EL - Greek

• EN - English (all English variants)

• ES - Spanish

• ET - Estonian

• FI - Finnish

• FR - French

• HE - Hebrew

• HU - Hungarian

• ID - Indonesian

• IT - Italian

• JA - Japanese

• KO - Korean

• LT - Lithuanian

• LV - Latvian

• NB - Norwegian Bokmål

• NL - Dutch

• PL - Polish

• PT - Portuguese (all Portuguese variants)

• RO - Romanian

• RU - Russian

• SK - Slovak

• SL - Slovenian

• SV - Swedish

• TH - Thai

• TR - Turkish

• UK - Ukrainian

• VI - Vietnamese

• ZH - Chinese (all Chinese variants)

Translation target languages

• AR - Arabic

• BG - Bulgarian

• CS - Czech

• DA - Danish

• DE - German

• EL - Greek

• EN - English (unspecified variant for backward compatibility; please select EN-GB or EN-US instead)

• EN-GB - English (British)

• EN-US - English (American)

• ES - Spanish

• ET - Estonian

• FI - Finnish

• FR - French

• HE - Hebrew

• HU - Hungarian

• ID - Indonesian

• IT - Italian

• JA - Japanese

• KO - Korean

• LT - Lithuanian

• LV - Latvian

• NB - Norwegian Bokmål

• NL - Dutch

• PL - Polish

• PT - Portuguese (unspecified variant for backward compatibility; please select PT-BR or PT-PT instead)

• PT-BR - Portuguese (Brazilian)

• PT-PT - Portuguese (all Portuguese variants excluding Brazilian Portuguese)

• RO - Romanian

• RU - Russian

• SK - Slovak

• SL - Slovenian

• SV - Swedish

• TH - Thai

• TR - Turkish

• UK - Ukrainian

• VI - Vietnamese

• ZH - Chinese (unspecified variant for backward compatibility; please select ZH-HANS or ZH-HANT instead)

• ZH-HANS - Chinese (simplified)

• ZH-HANT - Chinese (traditional)

As of April 2025, supported languages for text improvement (DeepL API for Write) have not yet been added to the /languages endpoint; we'll be extending the /languages endpoint in the near future to include this information.

Text improvement languages (DeepL API for Write)

• DE (German)

• EN-GB (British English)

• EN-US (American English)

• ES (Spanish)

• FR (French)

• IT (Italian)

• PT-BR (Brazilian Portuguese)

• PT-PT (Portuguese)

For the /write endpoint, writing_style and tone currently work in DE, EN-GB, and EN-US.