Thats a bit like a freind of ours who lives in Holland. She is a nurse and had to learn Dutch very quickly. Of course she knew a lot of medical words, but was a bit rusty on other words.

Anyway, one day she went into the greengrocers and waited in the queue. When it was her turn, she asked in her best Dutch for a kilo of "aambeien". The shop fell about laughing. She asked what was so funny. They said so you want a kilo of hemorrhoids.

Unfortunately the Dutch word for strawberries was "aardbeien" and she used "aambeien" by mistake.