I speak English (native)
I am learning Swedish and Japanese (both basic) actively, as I get bored of one I seitch to the other to avoid burnout. I learning Swedish because I have a soft spot for Swedish metal \m/ and Japanese because of anime, manga, games, ect, same reason as most Americans.
I am also learning German (basic) as an elective for school.
And no I don't get them mixed up at all, learning three languages at once is fairly simple for me, probably because I'm fascinated by all three of them and to me they all sound radically different so there's no way for me to get them mixed up. Although Swedish and German are fairly similar.