This type of question is usually postponed to be asked on the actual site, but since you swerved into the nature of SE Q&A's in general, I can offer a bit of insight independent of this particular proposal/site.
In any learning site, we generally do not allow folks to post broad "review requests" unless they involve a very specific question/concern about the content itself. In the context of a language site, we wouldn't allow folks solicit a broad, non-specific reviews of a translation… much like we wouldn't allow folks to request the translation of a passage, without a specific difficult-to-translate problem or idiomatic phrase in its content.
It's not that peer review is inherently unfit, but such reviews are better held in an interactive discussion format which our Q&A is explicitly designed to avoid. In our one-answer Q&A format (where the "correct answer" rises to the top), we would be doing this exercise a terrible disservice where the participants or voters don't actually know if they are helping the author specifically.
Where a peer-review could be useful is in the context of an interactive chat room. Chat rooms are created with the actual site.