My other kids never really did this, but my 2 year old DS2 does...
for example, on our DVR we have this episode of Jack's Big Music Show that he loves. There are two song clips in the video.
One is sung by a group of Af-Am men, the other is a white woman. DS2 has labeled the first one "The Daddy song" and the 2nd "The Mommy song"--it's been there for *months* that's something he came up with at like 18 months old.
The other thing is when he sees people dressed in obviously Islamic clothes on TV, in real life, whatever "Salaam alaikum! Dat salaam alaikum!"
I love hearing him...and yes, I give the adult spin on it but it's adorable to hear his interpretations.