Question

what does he look like的正确答案是what does he look like?

Answer 1

'what does he look like?'标准用法，地球人都知道是询问某人长相的意思.
回答：
He has straight hair.

关于'how does he look like?'需要好好分析一下语法结构。

一，He looks like a soldier的问句--->
"he looks like what"--->
What does he look like?

二，He looks like his father的问句--->
"he looks like who"---->
Who does he look like?

三，He looks well. He looks sick.的问句--->
"he looks how"---->
How does he look?

所以从‘三’的可以看出由于he looks like sick不是标准英语，所以'how does he look like?'也不是标准的英语。

所以我认为，‘how does he look like?’是不地道的英语。
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再补充一下：
A person "looks like" something or someone.
或者
A person "looks" somehow .
但
A person can't "look like" somehow.