English is the dominating language in the field, not only in EU/US.

As a native speaker of Chinese, I know people there are using the same OSs, languages and tools. Some of them are translated into Chinese, the rest are not as hard as English novels. There are a few "Chinese programming languages" that has Chinese keywords, they are not widely used or even considered less serious stuff.

Currently I am living in Japan and I see similar things here. So at least I don't think knowing Chinese or Japanese or other mysterious natural language can give access to irreplaceable resources.

On the other way, I did benefit from (non language-specified) theory of semantics. In both natural language and programming language, it helped me to distinguish and refine expressions in a way similar to code review.