[language] AI Answer and Suggested Replies to support more languages (content and answer)

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.