"Tá biachlár uaim."
Translation:I want a menu.
This sounds a bit... rude to me. Would it be considered rude in Irish too?
I thought the same thing but would 'Teastaoinn' not suggest 'I need' rather than 'I want'? Either way this one sounds weird..
Yes. Irish doesn't have verbs for a lot of things English does (Have, like, want, etc), so there's a bunch of colloquial structures.