In my own experience, being a foreigner who (seemingly) doesn't speak a local language actually does open doors to unique insights - the people who do speak English are quite ready to tell all the ins and outs, pros and cons, ups and downs, subtleties, gripes, concerns, cultural tidbits exactly because they think I won't go around talking about what they said.
Assuming in case of BBC correspondent Rupert it's not the same as with a typical foreign English teacher in Asia who doesn't care much about outside world and mostly hangs out in the same circle of foreigner friends (I'm slightly familiar with the culture).