• As a scientific discipline, Indo-European studies draw conclusions about this common basic language, the so-called Uro-Germanic, from the traditional Indo-European daughter languages ​​and reconstruct it in its various aspects (phonetic system, grammar, vocabulary, syntax). 
  • At the same time, linguistic appearances of the individual daughter languages ​​can be explained from the Urindo-Germanic and the subsequent linguistic developments, which include the Germanic, Romanesque, Balto-Slavic, Indo-Iranian and Celtic languages ​​as well as the Greek.
  • All of this is possible because linguistic changes do not take place arbitrarily, but in certain areas according to the same rules that are determined by Indo-European studies.