Interpersonal issues can be difficult, but the longer it takes for someone to come forward and point out that the process is wasteful and producing poor English documentation, the harder it's going to get. If the English documentation is valuable enough to produce in the first place, it's valuable enough to turn over to someone that can do the translation with little/no help from software translators.
In some cases, the process of translating the documentation can be at fault. It may be easier for someone to produce new documentation in English, using the original only where necessary, or as a guide for the structure and focus of the documentation.
As previously mentioned, it's likely this person's time would be better spent elsewhere, and reviewers would be better off reviewing someone else's translation.
In some cases, the process of translating the documentation can be at fault. It may be easier for someone to produce new documentation in English, using the original only where necessary, or as a guide for the structure and focus of the documentation.
As previously mentioned, it's likely this person's time would be better spent elsewhere, and reviewers would be better off reviewing someone else's translation.