>> Some of the best heavy sheetmetal guys are from VietNam, and don’t speak English.
If they cannot comprehend the technical details specified in the service manuals, you might have a problem.
Would you want such a mechanic working on the brake system of your 2010 family sedan?
Just because they can’t read the book doesn’t mean they can fix your gasguzzler.
I doubt there are ANY manuals left in Cuba, but those Fords and Chevys from the 50’s are still going strong, the brakes even work!