"Who is working at the markets?"

Translation: Ki dolgozik a piacokon?

[GerSzej]

ki a piacokon dolgozik. acceptable? it was rejected.

[96314081311257]

No, it's not. The question word usually needs to be in the focus, ie followed by the verb. Exceptions that come to my mind are miért (why) & hogyhogy (how come.) There might not be any other exceptions, tbh.

[GerSzej]

Thank you, this is a very useful answer

[Jean-Janos]

Why plural is valid... "Who is working"

[RyagonIV]

"Who is [doing something]?" can be singular or plural in English. There's no way to tell.

[KristinaGa570269]

I'm confused why the -on ending is used for sentences like this. How can you work on a market? Or does the -on ending have many meanings in Hungarian? How can we know when to use what ending?

[GregWood15]

Markets are, generally, open air environments, so you are considered to be working on them, whereas you'd work in a bank. Also you travel on buses, trams, and trains, but in planes, due to the lack of headroom in the latter.