I live in Thailand and previously lived in Japan - all the road signs in both places are in English.
Japan had zero English when dealing with officialdom but Thailand caters for both Thai and English pretty much.
So - my Thai never made it past getting home in a taxi, ordering food and offering to hold a beach towel while you get changed. I guess I'm not really in a place to comment... but I do find it odd going back home and hearing foreign tongues all over London, Manchester, Birmingam etc...
Up the empire !