Is there any chance that European Portuguese may be added in the near future?
You could do these:
I doubt Duolingo is going to add an European Portuguese course. Memrise is quite fun, might have to read up on grammar somewhere else though. If I recall correctly, I think I read on Twitter that Memrise is going to get grammar notes though, for the official courses.
I like to start with the wiki article on grammar: https://en.wikipedia.org/wiki/Portuguese_grammar
I really hope they do. The 2 are quite different and I'm sure I wouldn't be the only person to use it...
Our plant engineer is Portuguese by birth and he doesn't seem to have major problems between the two. Of course he also speaks Spanish and English at native level so maybe he's just exceptional
Practically speaking no. They don't even differentiate between British and American English. I don't see it happening. Of course that's just my opinion I don't work at Duo