This isn’t saying something funny by accident though.

When you’re on holiday and you ask the barman for nipple juice sure, you can all have a good laugh about languages.

This person is an employee, doing their best to perform a complex task that you were lucky enough to learn as a child. Imagine walking into the shop and having a good old laugh with the signs author about their bad spelling. I don’t think they would find it very funny.

Additionally, there’s a profound difference between having a light-hearted joke with someone, and posting it on social media where everyone can make lame jokes about people struggling to get by using English as a second language.

Honestly, I’m amazed that you’re insensitive enough not to understand that the two situations are completely different.