Pirate children’s tv shows in that language and watch them
You might pick up some casual phrases but unless you are spending a ton of time with them breaking it down, you’re now an adult, and you will need more than the shows.
Just become undocumented in another country. 😂
Guess you’re right, too bad I’m not a kid anymore.
Cool thing about being an EUer is that I don’t need to be undocumented, I could travel, work, live in another EU country with a different language from mine without a problem, but I currently busy in my own country and want to learn french
There’s Anki which is one of the most popular flashcard apps. Kiwix is pretty great for having tons of offline content from websites like Wikipedia, StackExchange, and Khan Academy, but I’ve run into a few bugs with it. I believe the current version isn’t on F-Droid but they plan to remove the non-free build tools in the next version. There’s the translation dictionary QuickDic. There’s some language specific apps like Der Die Das and Starke Verben for learning German, Kakugo, Fun with Kanji, and Kanji Dojo for Japanese. There’s several language specific dictionaries like Nani?, Nheengaré and a PReVo. For learning numbers/time there’s the Nanji clock widget that can show the printed time in several languages.
Anki is a great one. Less invasive than others.