Nothing against the foreign pilots but I got greater joy out of knowing I was training pilots that were actually going to be using US airspace. No offense to foreign pilot instructors but my experience (and Mineral Wells Texas with the lack of control tower and 3 instrument approaches sounds like Mumbai Mon - Friday) is that they are training to pass a checkride. And although Texan is not the easiest language to understand, some of the foreign candidates out there are really stretching the "read and speak English" clause. Especially when they're coming opposite direction at the same altitude flying outbound on an instrument approach in VFR conditions. But all the Texans I fly with are packing so at least we got that going for us in a dogfight