"Ön tanár?"

Translation: Are you a teacher?

[Goldragon979]

Why not: Are you the teacher?

[mizinamo]

There is no "the" (a, az) in the Hungarian sentence.

[Goldragon979]

Is the indefinite article the norm when not stated otherwise?

[egyszervolt]

Yes.

[Rudolf978436]

Are you the teacher?= Őn a tanár?; Are you (a) teacher?= Őn tanár?

[Assol28]

can it be like "Tanar vagy?"

[Shamarth]

It can, but it's informal. You'd ask that from someone with whom you're on a first name basis.

[gkelt1]

Duo, please allow sound-on (to listen) to pronunciation AFTER the question is already answered!

[SteveBauer2]

If asking it could mean is he or her a teacher.

[Shamarth]

That would be "Ő tanár?"

Ön is only used as formal you.

[mizinamo]

Is it always capitalised?

[Shamarth]

Not capitalising ön and önök can be seen as a sign of disrespect, but it's not incorrect grammatically.

[vvsey]

I think it is the new fashion to capitalize "Ön", "Te", and derived words. There is no grammatical base for this, as far as I know.

[egyszervolt]

It IS incorrect! As vvsey said, it's just a new fashion.

[Shamarth]

It's definitely accepted to capitalise second person pronouns in formal documents to show respect. See here.

[Robbadob]

New fashion ≠ incorrect

"Ms" as a title wasn't very popular until the 20th century, but now it is unmistakably a correct form.

[2019/04/16]

[Jasper878575]

Surely 'You're a teacher?' also correct?

[Robbadob]

Ön is supposed to be formal, so imagine asking this question to a stranger or to someone whom you want to impress or show respect to. A better translation of "You're a teacher?" would be "Tanár vagy?".

[2019/04/16]