If the instructions are mangled, you can be pretty sure that the entire operation is offshore, and they don't give a crap about any customers. In my experience, US companies that manufacture overseas also provide all the manuals, either physically, or the PDFs so they can be printed locally to save shipping costs. My old company has engineering and manufacturing facilities across the globe, but we also have a tech writing department with several dozen writers to handle documentation of the products. Those documents get translated in a dozen or more languages. I have to say that they did a pretty good job of writing them and having been in field service and development Quality, I was involved in reviewing hundreds of manuals, tech notes, and internal documentation before publication.