The Cloud Natural Language API supports a variety of languages. These languages are specified within a request using the optional language parameter. Language code parameters conform to ISO-639-1 or BCP-47 identifiers. If you do not specify a language parameter, then the language for the request is auto-detected by the Natural Language API.

The list of supported languages differs depending on the feature.

Content classification

V2 Model

Language	ISO-639-1 Code
Chinese (Simplified)	zh
Chinese (Traditional)	zh-Hant
Dutch	nl
English	en
French	fr
German	de
Italian	it
Japanese	ja
Korean	ko
Portuguese (Brazilian & Continental)	pt
Russian	ru
Spanish	es

V1 Model

Language	ISO-639-1 Code
English	en

Syntactic analysis

Language	ISO-639-1 Code
Chinese (Simplified)	zh
Chinese (Traditional)	zh-Hant
English	en
French	fr
German	de
Italian	it
Japanese	ja
Korean	ko
Portuguese (Brazilian & Continental)	pt
Russian	ru
Spanish	es

Entity analysis

Language	ISO-639-1 Code
Chinese (Simplified)	zh
Chinese (Traditional)	zh-Hant
English	en
French	fr
German	de
Italian	it
Japanese	ja
Korean	ko
Portuguese (Brazilian & Continental)	pt
Russian	ru
Spanish	es

Sentiment analysis

Language	ISO-639-1 Code
Arabic	ar
Chinese (Simplified)	zh
Chinese (Traditional)	zh-Hant
Dutch	nl
English	en
French	fr
German	de
Indonesian	id
Italian	it
Japanese	ja
Korean	ko
Portuguese (Brazilian & Continental)	pt
Spanish	es
Thai	th
Turkish	tr
Vietnamese	vi

Entity sentiment analysis

Language	ISO-639-1 Code
English	en
Japanese	ja
Spanish	es

Text moderation

Language	ISO-639-1 Code
Arabic	*ar
Chinese (Simplified)	zh
Dutch	*nl
English	en
French	fr
German	de
Hindi	*hi
Indonesian	*id
Italian	it
Japanese	ja
Korean	ko
Portuguese (Brazilian & Continental)	pt
Russian	*ru
Spanish	es

*language support is limited based on the type of text (eg. webpage, chat message, etc) for some attributes. In any case, we recommend thorough evaluation for your use case.