我们在课内外都说英语翻译成英文

we speak English both in and outside of school/class

或者想用高大上一点的词语的话可以译成
we speak English both intracurricular (课内的）and extracurricular（课外的）本回答被提问者和网友采纳

When your aerials are down, and your spirit is covered with snows of cynicism and t

We speak English both in class and after-class

we speak English inside and outside the class 就可以。