Entscheidungsfragen durch Inversion

English builds most yes/no questions with "do" or "does": "Do you speak Luxembourgish?". Luxembourgish has no helper like that. It simply swaps the subject and the verb, so the verb opens the question.

Statement	Question
Du schwätz Lëtzebuergesch. - You speak Luxembourgish.	Schwätz du Lëtzebuergesch? - Do you speak Luxembourgish?
Hien ass Dokter. - He's a doctor.	Ass hien Dokter? - Is he a doctor?
Dir hutt Zäit. - You have time.	Hutt Dir Zäit? - Do you have time?
Si wunnen zu Clierf. - They live in Clervaux.	Wunne si zu Clierf? - Do they live in Clervaux?

The verb keeps the form it had in the statement; only its position changes. The rest of the sentence stays in place, including a second verb at the end: Kënns du muer mat? - Are you coming along tomorrow?

Answering: jo, nee and dach

• Jo - yes, Nee - no.
• Dach is the yes that contradicts a negative question, like German doch or French si. English has no single word for it and says "Yes, I am!" with stress.

Bass du net midd? - Dach, ech si ganz midd. - Aren't you tired? - Yes I am, very tired.

Answering a negative question with jo sounds odd or ambiguous; that is what dach is for.

Tags and politeness

Where English adds "isn't it?" or "right?", Luxembourgish adds oder? or net?: D'Schueberfouer fänkt haut un, oder? - The fair starts today, doesn't it? Questions to someone you call Dir work exactly the same way: Schwätzt Dir Englesch?