It would not be so hard you just need to scan the QR code to pay with your mobile App i guess. Also yip it's hard to understand the language of a country where you are temporarily living .
Probably but I don't want to seem as a madman trying to pay someone via a currency that the cashier doesn't know how to accept, because possibly no one has taught them how to . And as I said, I don't want to take any chances if say the Bitcoin payment was cancelled months ago. Just saying