Victor from Russia wants to know: how many languages should a gentleman have?
At least one.
A gentleman can be unilingual. A polyglot is not necessarily a gentleman. As much as I like languages I know lots of excellent people who speak only one language.
So my answer is as many as you want.
But I am happy to have some Latin based languages, some Germanic languages, some Asian languages, and now with Russian a Slavic language. If you get one language in a group, the next one is easier.
But there are other things in life, like being a gentleman!
Thank you for prompt answer!