kaixo
Kaixo is Basque for 'hello', like if you were too lazy to use your full vocabulary.
I said 'kaixo' to my boss. He gave me a look like I had just insulted his entire family.
I texted my friend 'kaixo' instead of 'hey.' He called me a bad friend.
I used 'kaixo' in my job interview. They didn’t hire me.