Another thing to consider, regarding language/localization:
In real life, there are companies working today on "smart" street signs, store signs, etc., that automatically interface with portable cell phones, portable PDAs, computers, etc. I don't know a lot about this technology other than it currently hasn't really picked up steam yet, but long before 80 some years hopefully in urban environments one could walk down a street, and as they pass a restaurant, their cell phone or earpiece (with a computer in it) would chirp and tell them what they are walking by and if their favorite dish is being offered as a special that day or not.
One could also walk by a newspaper stand and get similar information.
Of course it would transmit in whatever the person's native language is.
I don't know if it would ever make real signs obsolete or not though...
Also, here in the United States where I am, there are plenty of stores with signs in more than one language in addition to English - Heck, I live across from (can see it from my window) a Chinese restaurant, they have signs in both English and Chinese.
I've heard that up in Canada, just north of where I am, signs are in both English and French.