Is "Have never seen" translated as 没看到
您真的没看到中国女孩说英语吗？
What, you look like you've never seen a Chinese girl speak English before!

It needs a 过
As dan and Tang Ho indicate, it's missing a 过.  See Expressing experiences with &quot;guo&quot;:

The aspect particle 过 (guo) is used to indicate that an action has been experienced in the past.

Compare:

他没看到我。  He doesn't see me. [perhaps present tense, e.g., 他 could refer to a taxi driver who doesn't see you]
他没看到过我。  He has never seen me. [past tense = 过去式 in Chinese]

See Result complement for more about 没看到.  There's also a related question here: What is the difference between 看到 and 看过?
Other issues:
After adding in the 过, the Chinese and the given English translation don't match:

您真的没看到过中国女孩说英语吗？
You really have never seen [a] Chinese girl speak English?

In particular:

The given Chinese sentence does not imply &quot;you look like&quot;.  To this end, we need some combination of 看起来 = &quot;appear&quot; and 好像 = &quot;as if&quot; or 就像 (there's other possibilities like 似乎).  But this seems wordy in both Chinese and English.

I feel like there's a mismatch between 您 (nín), the polite form of &quot;you&quot; and the informal tone of the rhetorical question.  Indeed, by using 您 it sounds like you're asking a serious question.

There's no equivalent to &quot;never&quot; in the Chinese.  It could be included with 从来没 or 从未.  I think 从来 is first encountered when learning Chinese, however.

In this context, I don't see a big distinction between 没看过 and 没看到过 here, or even 没看见过.  (There's some websites which discuss 看 vs. 看到 and 看 vs. 看见, which seems to indicate all three are okay.)

There is no &quot;What&quot; in the translation.  Literally it's 什么, but I'd instead suggest 嗯 as a grunt of surprise.

The Chinese is a question, whereas the English is not.


Rhetorical questions using 难道
A nice way to phrase rhetorical questions is with 难道 which means something like &quot;don't tell me that ...&quot;, which takes a bit of getting used to.  See Rhetorical questions with &quot;nandao&quot;.

嗯，你难道从来没看过中国女孩说英语吗？
Oh!  Have you never seen [a] Chinese girl speak English?

I think this captures the spirit of the question well, i.e., expressing surprise and disbelief.