有沒有英文怎麼說?

其實有時不一定要直譯的。因為直譯咁問會有點尷尬，西方人都通常會用以下問法。
例如想問：「有沒有其他女朋友」不如問…

Are you single (你是否單身)
Are you available (你是否單身)
Have you got any girlfriend (你有無女朋友)
又例如問：「你有沒妻子」，不如問…

Are you married (你是結了婚沒有)

Do you have any girlfriends or wifes!

Excuse me. Have you got a girlfriend or a wife ?

do you have other girlfriends or wife?