What language is that?

I spend some of my time reading liner notes of the music CDs that I buy. Like the Rosetta Stone, they are often written in three languages, although the languages are usually English, French, and German, rather than hieroglyphs, demotic script, and Ancient Greek. Once in a while, I open to the wrong language, and for a few seconds my eyes skim the German version of the text before it dawns on me that I am not looking at the English. 

Like most native speakers of a European language I can recognize a number of other European languages that I have no ability to read, write, or speak. How does this recognition work? Can it be put into a simple, not very sophisticated or difficult computer program? Continue reading