When I was in high school, I convinced my parents to sign me up for Japanese classes on the weekend because the sequel to my favorite game didn't get translated. Didn't end up getting all that far in it, my ADHD/autistic ass had a hard time paying attention in class and I had too much actual schoolwork to keep up with so I kinda just didn't do the homework.
But last year I started getting back into it just for fun, and I am having a lot of fun learning. Helps that I can go at my own pace without any pressure from being in school anymore. Still a long way from 日本語上手, but I passed a N4 mock exam and I just ordered a shipment of books and manga to try and see how far I can get. Saving up to travel in a few years too.
Freeciv is not free-to-play, it's Free Software.