It's not.

However this is easily "beaten" by using circle to search -> translate on your smart phone.

After "beating" it with a translator, take a hint and don't enter still.

Xenophobia: :(

Xenophobia, Japan: :)

I guess the trick will be less effective to the extent to which people try to work around it. But,

1) most people wouldn’t bother to translate something with a fake translation right above it

2) why do people want to go places they aren’t welcome? It is good to let the locals have some things…