Did you ever own "foreign language media?"...

Since English isn't my mother tongue, all stuff in ENG that I owned as a kid I mostly tried to understand the story/playthrough on the go, just as you said   Nowdays I don't treat stuff in English as foreign language media, as I get in touch with this language at the same frequency as my own native one. 

Also recently I got gifted a Blu-Ray - DVD 4K remaster of La revanche des Humanoïdes, a feature film-length cut of last 6 episodes of a 1982 French edutainment sci-fi series Il était une fois...l'Espace (or Once Upon a Time... Space). I know zero French, only wanted it for the extra crisp footage (and the commentary which, to my zero luck, is not subtitled) xD luckily I saw all episodes in a language I understand (Czech) beforehand so figuring out what they were saying was much less of an issue.

Any differences? Is it dubbed or subbed? Or just offers a number of language options?^^

A lot of ingenuity and finagling there! Kind of reminds me of when Youtubers would review movies and get heavily stuck on copyright and more or less just say: "You're gonna have to find your own copy of the movie and follow along with me."

Those Japanese anime stage plays are super interesting to me since we rarely ever get them over here, or heck, even filmed versions of them for DVD but they seem pretty common over there. I would imagine you would still very much need fansubs even today, it's not like they're putting these things out over here at all. 

At one point, I found a random Spanish (Spain) language manga from some show called World of Narue at a board gaming convention. No idea why it was there, I don't have it anymore sadly but I think I got lazy and mostly looked at the visuals (sorry for those $$$ Spanish language classes you paid for, parents). As a side note, Central Park Media had the American rights to the series and then went bankrupt, ADV Films picked up the rights and then ALSO went bankrupt <_<

I used to own some Japanese language visual novel magazines. I actually attempted to read those without a translator or dictionary. At most, I understood like 40% of the text.

It's getting better where I live, but currently unless you go directly to an international area (IE ethnic enclave), and/or are lucky to have a library with a major international clientale, finding any major written materials that aren't just English/Spanish can be a bear. It's neat you have that access to foreign books especially at a THRIFT store of all places, I know the internet exists, but I just don't like reading stuff on computers (outside of web forums) much. 
Probably a difference between a suburban area vs. rural area vs. urban area. My main old home library had Spanish IF you were lucky. 

I did find a library once (another part of the Southeast USA) that had a FULL giant bookshelf of Japanese books and was pretty surprised. I found a few copies of Guin Saga there. I also taught some Japanese students (ESL class) whose parents took them to some college for classes, and they would bring back tiny, tiny Japanese light novels, those ones with up/down text going right to left I think. Pretty cute. I don't mean like Isekai, I mean like some fantasy series called Fortune Quest as well as "children's adaptations" of books like The Old Man and the Sea (WTHeck). 

Very cute regardless! As another forum user put it here, "just looking cute" is enough get enjoyment out of a product sometimes. Does the DVD have multiple languages? I know sometimes European products will have a LOT of language options which is neat.