Is it possible to translate reCAPTCHA into a different language?
Yes. To change the reCAPTCHA language, the user needs to update their language preference setting in their web browser.
This is because the reCAPTCHA language is based on the user's preferred language from their Web browser preference setting. The accept-language header, which is passed via HTTP, contains information about the user's language preference.
For more information about reCAPTCHA, see About Help Center spam prevention.