Probably because github and stackoverflow write them in English ;) Also there is no need to translate technical lingo if everybody understands it. More general

Probably because github and stackoverflow write them in English ;) Also there is no need to translate technical lingo if everybody understands it. More general IT terms are translated sometimes (e.g. hard disk = Festplatte, keyboard = tastatur). I'm sure a linguist could explain why it happens in some cases and not in others.