我后悔了,因为我说了。的英语翻译

其实翻译是要放在语境里才有实际意义的，拿楼主的问题为例
当表示因为自己说的内容而后悔可译为I regret having said that；
表示说了某些不该告诉听话者的事情译为I regret that I have tell him/her that;
because表示很强烈的语气，只有说话者强调原因的时候才才用because翻译，译为I regreted because I have told it.
say是及物动词，后面应该加宾语。2楼的回答有语法错误。

I regret it because I said

Regretless because I had said it.

I regret saying it.