Yes, there is.
http://en.wikipedia.org/wiki/Homophone

It's one of my big pet peeves.
Interestingly enough, I see this error a lot more in native speakers than in people who had to learn the language (my native language is also German).

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Si tacuisses, philosophus mansisses.

"Half of what I say is meaningless, but I say it so that the other half may reach you."