It makes sense to me to serve your customers in any language you can. So if you've got alot of Spanish clients, you bet I'd serve them in Spanish, if I could. It's not unlike here, where we have lots of French speaking people. I've had lots of staff who were bi and trilingual, so there's always lots of different languages being spoken, but I wouldn't put it on my website, unless I knew for sure that someone who was fluent in the language was always in the shop.
Hey Boss, you know how they say America is the "melting pot"? In Canada, we think of ourselves more like a "stew"!
JP