I'd like to believe that Layla has always thought to herself in broken Japanese. She just always assumed it was gibberish.
Cinderella Girls Theater
劇場第1208『タナカラ・ボタモチ』
Theater Episode 1208 - A Mochi Falls From the ShelfYou too, Layla-chan~? You shouldn't sleep on the floor~Ohh... If I'm laying down, my neck will not hurts~Ahh, it is~C'mon, get up~Ahh~Time to get up~ Here, I have candy~Anzu-chan~Layla-san's neck is starting to it hurtsBut, if not always looking up, one does can't notice...It seemed was like a dream, that a treat can fall from top of shelf towards a mouth~'A mochi falls from the shelf'I found an interesting oneDuring studying Japanese proverbs...