Translation:I have five siblings, three sisters and two brothers.
I think the only conversational context in which I have heard "sibling" used in English, including American English, is in the phrase "sibling rivalry". Otherwise I associate it with official documents and professional papers, especially in psychology. To me, it seems an affectation to use it in day to day speech. But I wonder if that is a generational thing. Do younger folk perhaps use "sibling" more freely?