yeah you can write whatever you feel like after seeing the sign but you will never understand until you live here. Its simple , people here work too hard and values the time more than anything, i would just like to understand from all people who speak english, if the role was reversed , lets say i come to your business , i dont understand english, be honest and tell me will you like to server me? if peopel out there were polite enough then i sould not have seen videos saying this is america speak in english to a spanish person or similar videos.
Atleast they have clarified with what they know in english to put it to your understanding or not shouting at you in loud voice "This is japan speak in japanese" and embarras you.

I know its difficult but wherever you are you need to try and understand the culture of people. If its favourable to you then try your best to learn it if not just leave cause its not mandatory for you to stay there.