Indo-European language Swedish belongs to the big Indo-European language-family and is, more or less, remotely related to several of today’s European and Asian languages. Related means, in this case, that all of the languages have been developed from the same source: The Indo-European or the Proto-European, a language which hasn’t been preserved and which, according to some sources, was spoken 5000 to 6000 years ago. Already by the end of the 18th century language-researchers were discovering non-coincidental similarities among the big cultural languages of that time: Latin, Greek and Sanskrit. The similarities, which concerned basic grammatical structures as well as accordance in concern of the vocabulary, could only be explained with the theory that they all had developed from an older, mutual protolanguage.