I've written about a few things on my blog (http://blog.debugmyresume.com/2018/04/11/quality_over_quanti...), but any time someone lists more than 3-4 programming languages, I'm immediately skeptical.
But if someone does this on occassion as a hobby, how is it weird to know, or have some projects in 10 or even 20 programming languages ?
Also many projects are programming languages in themselves (Greenspun's 10th law). Tensorflow, most scheduling packages I've seen, prolog, several things I've written ... Once a project grows beyond a certain large size, it tends to become a programming language in itself.