Currently, it's not possible to change the language of the widget. Even when we change the language on the browser or on the instance, the widget is still generated in English. The widget will follow the language configured for the Request type, request type field and the text configured in widget settings. However, for the hardcoded text, for example How can we help?, Contact us about, Powered by JIRA Service Desk, Your contact e-mail, and Send button can't be changed.
It would be great if we could choose different languages on the widget.
Some customer is not able to understand other language. So, it is better to standardized the language.