Spanish speaker here. My experience is that English keywords in programming languages aren't an impediment. Most other programmers in my country (and others, judging by what I read) share my experience.

Localized keywords don't translate well to a later experience with programming languages at large.

Kids in the 80's learnt Basic in English just fine. Even basic terminology such as input, output, load, save and so on. Also we began to learn English by age 8-10 or so, so is not an issue. As they stated, the biggest issue is that the documentation itself is, by a huge margin, in technical English.