This would be much more relaxing and less error-prone than the copy-and-paste part.
A lot of spaces are repeatedly incorrect and some of them even cause rendering issues.
Also some words are just wrong in some cases but not all (e.g. an HTTP header can be called “标头” but a page header should be called “页眉”).
Others are more case-by-case.
I’ve updated the translations in the admin interface when I noticed a strange translation and over the past two months a lot of them have been fixed and no new ones pop up for a while now.