The refrain 'Leru-i ler' in Romanian carols has various interpretations, from a simple chorus word to a reference to a stove.

Interpretations include possible Celtic or Hebrew roots. There are also other interpretations, such as an association with the Latin singular of the god Lar, protector of the home. Singer Ștefan Hrușcă claims that "leru-i ler" is just an ordinary refrain with no particular meaning.