YOU SAID:

I have to learn English in school as I'm pretty much already fluent in it.

INTO JAPANESE

私はすでに英語に堪能なので、学校で英語を学ばなければなりません。

BACK INTO ENGLISH

I'm already fluent in English, so I have to learn English at school.

INTO JAPANESE

私はすでに英語に堪能なので、学校で英語を学ばなければなりません。

BACK INTO ENGLISH

I'm already fluent in English, so I have to learn English at school.