On the "people language" side, I learned Latin growing up Catholic (altar boy, and a brief time in seminary. Until puberty kicked in, and changed my mind about that career path :
). In the 70s, I lived in Toronto, and learned French from listening to the CBC and Quebec rockers (although there are those who would argue that what I learned wasn't really "French" ;)). In the 1980s I hosted a Japanese exchange student one summer, so I learned a bit of that. In the 1990s I worked for a company that had a partnership with Siemens, so I picked up a smattering of Italian from reading their documentation and working with the engineers they sent over. And, living an CA and AZ for most of my life, I've acquired a bit of Spanish (though nowhere near as much as I'd like). But I've never really been fluent in anything but English.
I started in mainframe DP in the 1970s, so all my formal instruction was in FORTRAN, COBOL, RPG, and a couple of different assembly languages. Over the years, I've self-taught a bunch of others as needed for jobs, or to satisfy my curiosity: PL/I, APL, SNOBOL, C, FORTH, BASIC, Perl, Awk, PHP, and assembler for an assortment of CPUs.