This is currently translated as “All of your brothers and sisters are married. When are you going to get married?” but I think this is wrong because it mistranslates “willst” as “are going to”, i.e. “will”, instead of as “want to”. This is important because these words, “wollen” in German and “will” in English are false cognates and are often confused.
I added a new translation on Tatoeba that I think is better: “All of your siblings are married. When do you want to get married?”
It also a bit more directly translates “Geschwister” and is more concise as a result.