我有两个双胞胎弟弟用英文怎么说

"双胞胎" 用英语说是 "twins"。

"弟弟" 用英语说是 "younger brother"。

所以 "我有两个双胞胎弟弟" 用英语说是 "I have two twin younger brothers."

举个例子：

"I have two twin younger brothers." (我有两个双胞胎弟弟)
"My twin brothers are both younger than me." (我的双胞胎兄弟都比我年轻)

双胞胎这个词来源于拉丁语 "gemellus"，意思是 "同胞"。"twin" 这个词来源于古英语 "twin"，意思也是 "同胞"。