I've learned Japanese and part of the reason is that I thought kanji were attractive. I remember watching anime on TV when I was a kid and seeing the opening credits with Japanese characters looked soo cool.
I'm not at all interested in anything I've seen in other non-English languages, except possibly Korean now, since they seem to be producing a lot of stuff.
However, almost everything that I'd enjoy gets translated to English for both Japanese and Korean now, so there's a lot less incentive to learn them.
No wonder my second language was English and third language Japanese.
Never heard a single word of Mandarin in any media I was exposed to. I can understand Spanish very well but I do not count it as a learned language as it is too close to Portuguese (my first language).
Chinese evil. Communist. Bad. Bad Chinese. Bad bad. Cheap products.
Japanese. exotic. mystical. Samurai. Ninja. Anime. Good. Sony. Good. Good cars. Zen. Good.
Me good. Me learn Japanese. Me exotic and mystical. Super power. Me good. Me smart. Me learned Japanse. Me great.
Me me me. Me me me. Me me me.
2. Japanese is becoming one of the most popular languages for foreign media, probably even surpassing English at this point. Anime is really huge now, particularly in the US. It has shifted from being a nerd thing to being of interest for the "cool kids" (if there is even such a thing now). Japan also had a huge and very interesting media industry in the 80s and 90s including some very novel video game concepts, most of which has not been translated
Accordingly, the stereotypical CS major is attracted to Japanese and Klingon, the stereotypical Business major to Chinese. Even though few follow through because of the amount of work and perseverance required
At this rate if 2/3rds of their popular media(manhua, games, animation) continues being cultivation fantasy featuring the exact same power system, tropes, character archetypes, often even setting(murim) and content, it never will.
Animanga were always poised to make it big, because for all their shortcomings, they have interesting, exotic(to us) themes/tropes/vibes, and go really hard on hyping scenes up.