I'm not so sure in what games it happens but one of them it's Metroid Prime 2
And as for the port, I'm pretty sure that is plugged in port 1, and yes it's a GC controller
You can try taking it to repair also but I highly recommend you to take it to another place.
On my personal experience I will totally buy another Wii without thinking it twice
The most likely is that the antenna isn't working, instead of taking it to reapair I recommend you to buy another wii
On Mexico that would cost $200 pesos and a wii costs $300-$400 pesos
In Mexico Duolingo it's a very popular app to learn a new language, it has multiple games and rewards to make it the less tedious way and actually have some fun while you are learning. I've never tried but I've been told that is a good app