[jolux]

>Learning languages is relatively simple and enjoyable, especially when the overwhelming majority of those people never end up working on difficult problems in said language.

Learning languages is not simple and enjoyable for everyone, especially not when they're languages with a radically different paradigm. I will definitely look twice at a JavaScript programmer who says they're also interested in ATS and Forth, for example. It should be fairly straightforward to suss out a rough level of understanding, and beyond whether or not learning languages is easy, it's a fairly strong signal of intrinsic interest, which a lot of employers want from their employees.