Auto language translation
It will be perfect if it can understands the questions in whichever language, then find the answers from the KB and return with the 'asked' language, optionally combine the answers in default language.
For example, I have KB in English, if the ask is in Japanese, it can understand and find the answer from the KB and return the answer in Japanese and the English (bilingual answer).
This will help a lot for preparing the multilingual KB when the chatbot is globally deployed.
As of now we support Language setting at service model. But we are working on QnA Maker V2, which is currently in private preview, where language setting will be specific to every KB instead of Service.
Multilingual KB cannot be supported as this impacts the ranking and response as semantics of every language is different so are the analyzers and rankers for the same.