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by arithma 2953 days ago
There's a book: 7 Languages in 7 Weeks that tries to pick a language from different "domains" (functional, imperative, prototype...)

Might be what you're looking for, a quick way to asses the landscape.

As for mastery: yes, you need to be able to master at least one language, and plan to always master the language you are going to use the most.