When to stop

Hello everyone,

I’m currently in Toronto studying English, and my time here is coming to an end. I have been thinking and when I return to my country, I’d like to start learning another language, maybe Spanish, Japanese or Korean(I haven’t decided yet).

However, I’m unsure whether I should continue improving my English or fully shift my focus. I’m saying this because I guess some of you have faced situation before, and I’d really appreciate your thoughts.