Supported browser languages
Opt in to use ChatGPT in your preferred language
Visit chat.openai.com to sign in to ChatGPT on the web.
Update your browser language to any of the above supported languages.
Click Join alpha in the banner that should display in the UI in ChatGPT.
Experience an early preview of ChatGPT in your language. [Join alpha]
For example, here is the banner when the browser language is detected as Spanish for you to opt in:
You should now see the ChatGPT UI displayed in that language!