vkbxemupun

Knowing English definitely is an advantage, but how big?
If you’re not interested in an international careeer (many people aren’t), you have quality education available in your local language, and there’s a thriving local tech scene I don’t see why it has to be that much of a disadvantage.
There are many other languages that are big and used by tens of millions of people. In most of those languages you can find all the books, courses, and conversations you need to take up computering.