【歪批译吧】他虽然貌不惊人，但语出惊人

He has an unattractive appearance, but his words are surprising.
楼上犯了两个错误,英语中though 和but 是不可以连用的,只能用一个,另外,word 的复数words是 n. (某人所说的)话(word的复数),所以应该用复数.
楼主提供的这个句子主要要表达的意思是,他虽然其貌不扬,但是言谈却很令人意外.

Although his appearace is not alarming, but his words is surprising

Though his appearance is not so unusual, his words are amazing.

Though his appearance is not so unusual, his words are amazing.