What should I do?

A German lady wrote me something strange in Dutch.

Should I reply in Dutch, English or German? She is older than I am. I think she was thinking about something else and wrote me something odd.

"I think you should learn Basque from Swahili speakers."

It was something along that line, with different languages. I think she must have been thinking about something and lost her train of thought.

What should I say? Just "Thank-you?"

Thank-you for your suggestion?

Respond like this....

"If I want your fucking opinion, I will ask for it."

Actually, I did ask for her opinion, but this answer was out of left field (as some might say).