AI-based features seem to support some languages but it's not guaranteed for many of them. cc https://help.front.com/en/articles/914304#prerequisites
It'd be great if features like AI answer for chat, Suggested replies could leverage knowledge bases in more languages.
It'd be great if Suggested Repplies could answer in the language of the question instead of English
AI Answers: supports content in English-only or French-only
External Knowledge Source for AI Answers: English-only OR French-only content
Suggested Replies supports English. You must have a Front Knowledge Base that is published in English for this feature to work.