Trouble with words.

Anybody had trouble with customers understanding English as spoken here?

Something I was reading reminded me of a case in point.

I had a lady with central heating problems, we were discussing what to do when her friend visiting from the states chipped in "so what you need is a pump with a lot of spunk"!
Both the lady and I burst into a fit of giggles and through her tears the lady said to her friend she would explain later

 

We didn't discuss pump head either!