How do you say "what did you buy?" in your languages?

It's rainy Sunday...What about your place?

I'm working on my dissertation and I just came up with a question. Is there any oral language which requires two interrogative words to make an interrogative sentence if we follow prescriptive grammar?

For instance...

What did you buy? (English)

Nani-wo anata-wa katta-no? (Japanese)
(What-acc you..........bought -Q ?)
"What did you buy?"

After all, my question will be like this: How do you say "what did you buy?" in your languages? Do sentences in your languages include more than two interrogatives?

I'm currently searching this now...
I would appreciate it if you could give me the way you express 'what did you buy?' in your languages=)