I can imagine that lol It's fine as long as somebody you speak with understands these languages. The problem starts when you sprinkle too much of other language, your speaker doesn't understand it and just look at you with "wtf you just said" on their face XD
Most of my irl conversations are in Polish, online I use mostly English, I consume media in Polish, English and Ukrainian, sometimes a little bit of Russian (tho I only understand it, I'm not really able to speak). When I speak to my grandparents - also Ukrainian. On top of that I'm learning Indonesian and Japanese at uni XD My life is one huge language mash-up