It was this: they were hopping from one language to another every few sentences. But LoM's accent lagged the hop by about a sentence: for example, when she went from French to English I heard a sentence in English with an unbelievably heavy French accent!
LOL!
I had a German friend whose brother had come over for a visit while we were neighbors. She got so involved in translating that she would speak German to us and English to her brother.
I’d look at her and say, “Ilona: Nicht Deutsch!”