Regional special units?

I didn't think about it before, but I've been playing my French campaign for a while and so far the only one's I've seen are Polish Legion (which sadly you can only get from recruiting them in occupied Poland, I just got Fusiliers of Line as my gift units), but I've mostly just been messing around in central and the edge of eastern Europe. Someone told me they got Polish Legion as Russia so that's interesting. Can other factions besides GB recruit Highlanders?

I think we should start to compile a list. I just have to know. Gotta collect 'em all!

Sorry if this has been posted before...been too busy playing to check the forums lately

My known regional units:
Huangarian units (Huangarian line infantry ,grenadiers and hussars) in Budapest, and only Austria can recruit;
Grenzers, only availabe for Austria in Croatia.
Swiss legion, available in Switzerland for any faction occupying Switzerland

theres a swiss legion which can be recruited from luzern