Options For Nothing

Some software installation options allow the user to choose a language. A piece of software I installed recently had the following options – see picture. Why is the English USA English and not English English? Why give me what looks like different options for English without giving me different options? Maybe these options are listed like this to stop English English speakers getting upset about the software only using American English? Maybe the Portuguese option is only Brazilian to stop the Portuguese moaning about using a language that isn’t really their own? I do not know the answers but I do find options like this to be stupid.

Annoying Language Options
Annoying Language Options