By learning it of course!
well, obviously you learn.
A person who speak different languages is called a Linguist.
the evolution of languages. simple.
He can speak 43 different languages! he is AMAZING!
he can speak latin
7 languages
they speak different language in different countries. For examples France they speak french the US we speak english and in Italy they speak Italian.
William Shakespeare could speak 4 different languages. English, Latin, French, and Italian were the languages that Shakespeare could speak fluently.
because people speak all kinds of different languages
A "polyglot" is someone who knows several languages.
In Communist (mainland) China. Mandarin is the official language and spoken by the majority of people but differing regions speak different languages.
You are a polyglot; we don't have separate words for varying numbers of languages people speak, and if we do the use of them is disingenuous.
Because they are different countries with different histories.