I guess it depends how you define, "Written in english." Standard keywords in, say, C++ are derived from english, though they have a symbolic meaning everyone has to learn. I'd understand variable names and docs being in a foreign language.

Best-case is still engligh, though; working in another language is like doing science in American units. It works fine as long as you stay localized, but if you need to hire foreign devs to supplement your team, good luck (see the infamous Mars rover crash.)