In this case they were still using English, with minor differences. Imagine one of the Indian externals writing an internal script that utilizes the Indian localisation. You'd have to whip out a translator or dive into the docs for a tool which you may have already used countless times and know how it works when instead, they could have simply learned the English arguments for the tool.

Nothing against people not being native speakers of English, I'm not one either. I just think that this creates more problems than it solves.