Learn Turkish: Düğün geç bitmiş mi? - Did the wedding reportedly finish late?

The phrase bitti mi is the definite past tense, used when you have direct knowledge of the event (like if you were at the wedding yourself). By using the reported past bitmiş mi, you are asking about an event you didn't witness. For example, you might ask this if you stayed home but your friend went to the party, meaning: Did you hear if the wedding finished late?

I always confuse the Turkish words for wedding and marriage. Is düğün the event or the relationship?

Düğün strictly means the wedding party or ceremony. If you want to talk about marriage as a relationship or a legal institution, you must use the word evlilik.

Could I move the question particle to say Düğün geç mi bitmiş?

Yes! In Turkish, the question particle goes immediately after the word you want to emphasize. While geç bitmiş mi? asks if the action of finishing late actually happened, geç mi bitmiş? specifically emphasizes the word late, asking: Was it late when it finished?

Why is the question particle mi and not mı?

The question particle always follows 4-way vowel harmony based on the final vowel of the word right before it. Because the reported past suffix in bitmiş has an i, the question particle must also take an i, becoming mi.