I have a similar story from an old work colleague who worked in the gold mines of South Africa for a while. They have basically their own language called Fanagalo, a pidgin English type thing, I believe.
He was using all his recently learned linguistic skills to try and describe a medical establishment, and spent several minutes talking about big houses full of sickness, people who saw death, brave people with masked faces and knives, before someone said...
"Ah, boss Jim...the hospital!"
It's one of those stories that's better told, but it still amuses me to this day!