Yeah, I tried it for about 2 hours yesterday. It was indeed strenuous when having to think about both the language and the complicated topic being discussed.

I was asking it to correct my wording as we went along, and despite some weird stuff now and then, e.g. "Abfrage" for query, it was quite good.

I think benchmarking some tasks in both languages would be quite cool. I remember about a year or two ago benchmarking tasks in different languages was quite popular.