I taught English overseas for many year, though I have only visited Japan. I would not quite consider English a status symbol, but more of something they use... sort of randomly... and with little or no attempt at any relationship to the actual language. Those wonderful signs are more attempts at translation for tourists or business purposes by people who have a smattering of English. But one needn't go far off the beaten track to find NO English. Even Osaka airport had no translation help for anything... be it finding the bank or buying a bus ticket.
Thus the English at this RV show was odd unless they are marketing these units to Australia or New Zealand - which is a possibility that I hadn't thought of when I first posted about it.