So you played SSBM NTSC version? Or the PAL one? You have get so in the first case the special trophy that are not in the PAL version. With all the thing like Samus grab being moved and Fox being not nerfed. Also i have learned Enlgish with time basically,i used Google Traduction for along time until i see enough video and page in English for that i know how to speak, writing and understand it. And really, it's a good thing since i will not be here if i never known how to speak English, granted this is not the case.
Remember, I live in Canada Quebec, the province has French as main language but not the country.
In fact, You could get manual trilingual (eng, fr and spa), but the game is most of the time ALWAYS English.
idk the ntsc difference, but the point is that I can truly tell you that playing that game changed my life a lot.
Learning was just easy for me, the schools in Quebec will give English education because you just almost need it. I got classes from end of elementary school to even college (that means I just had one and I will have the last one next semester and yes, THEY ARE REQUIRED!!!).
Where I truly put a lot of effort is using internet on high school, it's just a wonderful experience. So much that I don't even use any devices and software in French now.
Which is what lead me to youtube in the first place...
But yeah, you just don't need to put much effort to learn the base because you get classes.
Fun fact, I DRAMATICALLY improved my speaking after watching for a whole summer streams of speedrunner that talked in Englisg, it's amazing how my ears can learn to pronounce by just remembering very small details in the sounds