Languages supported

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

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

• 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

• TR - Turkish

• UK - Ukrainian

• 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

• 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

• TR - Turkish

• UK - Ukrainian

• 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.