Not knowing English in software engineering is the same as living in the USA not knowing English or flying airplanes not knowing English. It might be possible,

Not knowing English in software engineering is the same as living in the USA not knowing English or flying airplanes not knowing English. It might be possible, but it leaves you with a lot pf restrictions and a very small community. Personally, I got fluent in English by reading a lot of manuals and documents when I learned programming in the 90s where I had no internet and thus no way to connect to other German developers.