I wasn't talking about French speakers. We are speaking about English usage. I have heard French people say "Sourcecodes" or "Sources" too, but that is also som

I wasn't talking about French speakers. We are speaking about English usage. I have heard French people say "Sourcecodes" or "Sources" too, but that is also something I would never personally use in English. Sourcecode is uncountable, so it is already implicitly multiple things, so plural is redundant.