I imagine you could have a non-English toolchain, it's just uncommon. You may have to write a bunch of it yourself.

Come to think of it, I wonder if there are language concepts that don't map to English that artificially restrict what we can program?

For example would programming U->D, R->L in Chinese (vs L->R, U->D in English) result in easier to read programs somehow?

Would being able to program using iconography (like a bunch of FE languages) result in more "screens" of text to aid understanding?