I realized I had to surmount the language barrier.

我认识到我必须得克服语言障碍。

Kids were having a hard time in school just because of the language barrier.

因为语言障碍，孩子们在学校过得很艰难。

Is this someone with a language barrier?

是有语言障碍的人？

You have to overcome the language barrier.

你必须克服语言障碍。

Dance is an entertainment without a language barrier.

舞蹈是一种没有语言障碍的娱乐形式。