Etymological dictionaries compare existing words with those in older languages and do not take into consideration their natural origin. The origin of words is not defined with the use in ancient languages since most of important words have their own, much older natural origin. This is connected with that what people had heard, seen, touched, looked, understood and concerned and these perceptions expressed in their language. Many expressions with unknown etymology could be explained with help of Slavic languages.
      Genetics is supplementing our knowledge about the origin of Slovenes, which is of similar age as the other European peoples. Genetic characteristics of Slovenes are similar to other west Slavic peoples and also to Central Europeans and Scandinavians.
      On decipherment of ancient inscriptions the most important is to choose the language of understanding. The frequency analysis uncovers good accordance with the properly chosen language of understanding. Slovene as undoubtedly the most archaic Slavic language is confirmed as useful also by the frequency analysis of sounds, of average length of words and frequency of the first and last sounds in the words.
      Understanding of Venetic, Rhaeti( and Old Phrygian inscriptions made it possible to put together respective glossaries as a basis to define the dialectal degree of them. Dialectal words in those ancient languages comprise more than 60 % of all, and literary words less than 25 %, so for a suitable use of terminal sounds in the words the dialect in which an inscription is written should be known. This demands special linguistic study since the dialects in which mentioned ancient inscriptions are written are not known to the linguists.