I definitely feel learning a language expands your understanding of the world as you’re no longer limited to just one corner of the world nor reliant on translators. It’s also fun to communicate with people you would’ve never have gotten into contact with otherwise
For English it opened me unending trove of knowledge and online interactions and capability to access more first hand information. Plus all the books, music and movies. Faster and without shitty translations. For Dutch slightly more tolerance from from the other half of the country. Surprisingly very little in terms of music and medias but given my very narrow tastes it’s likely my fault. For Spanish some fun and free drinks which is already a miracle considering my shitty level. For Japanese I’m starting to enjoy og material (anime and manga) and surprisingly basic tv shows. It’s unfortunately very unlikely that I’ll ever reap similar benefits compared to English.
Somewhat I believe I’m less of an asshole from what I learned by interacting with others which would have been much harder if I hadn’t learned other languages.