I've always accepted the non standard R/T and non English R/T in foreign airspace as a challenge, rather than as an annoyance.
We are guests in foreign airspace and cannot expect the locals to refrain from talking to each other in their own language. It doesn't matter what ICAO says, because ICAO cannot impose R/T rules, it can only recommend. So, when you fly between Urumqi and Shanghai, you'll hear lots of Mandarin R/T; and between Buenos Aires and Cochabamba you'll hear lots of Spanish R/T; between Khartoum and Cairo you'll hear lots of Arabic R/T . . . that's just the way the cookie crumbles, and it won't change in our lifetime.
