I always mix Japanese and Korean. I just wait until I understand a bit of it, or write it off as Korean ^^ haha
But really... I was trying to figure out if all these BoA songs were Japanese or Korean, and I find in her Korean music eery phrase ends with the syllable 'jou'. Listen to 'My Sweetie', you'll see what I mean
Now I dont know a word of Korean, but maybe it's a clue!
My Korean friend always talks to her boyfriend when I'm around in Korean, and they'll be babbling along and I'll be like.... wha...? But I listen becasue in our Phonetics classes we have a lot of questions about Korean... so I try to hear the things we study... fun fun...