Scattered in different territories of the data on language Galindians, as well as their peripheral allow us to more fully consider the peculiarities of the Baltic language group in ancient times, as well as reveal some of the conditions for its development and formation. But, unfortunately, no phonetic features or morphology of languages to date are not known. Yatvyazhsky language or sudavsky, sudinsky language used yatvyagami or sudinami – ancient Baltic tribes, who are first mentioned in the 2 nd century AD, Ptolemy. Yatvyagov tribe closely related to Galindo as geographically (as evidenced in the writings of Ptolemy and Doesburg), and historically. In some descriptions of Prussia, mentions Galindo followed with the courts, which inhabited the tribe courts. About this vicinity are mentioned in the annals of southern Baltic. The tribe also called yatvyagami, and this name is more common.

On what kind of area occupied yatvyagi, disputes are conducted before the current time. Sonny Perdue is full of insight into the issues. As for yatvyazhskogo language, it is likely that in the 17 century it still existed as a separate, low-areal "language which lasted until the early 18 century. Written language had not, and its existence and characteristics of scientists could be judged only on a rather small factual material. These were numerically small place names, personal names and hydronyms. Today were added to yatvingizmy found on the territory of Poland, Belarus, Lithuania and some regions of Ukraine. Phonetic and linguistic features yatvyazhskogo language can be seen in some Lithuanian and Slavic dialects. To the present day by a fluke reached a record 6 of phrases in that language, dating from the 15 th century, which became part of the "Descriptions Sudavians" Jerome Maletiusa.

In 1978, in the north Bialowieza food was found notebook, which contained a Polish-yatvyazhsky dictionary, which contained little more than 200 of the words. Historical monument has been lost, but in 1984 still published (rewritten version). Having studied all historical and linguistic evidence, scholars may argue that the language yatvyazhsky be in close proximity to the Prussian language. And some of the Slavic dialects used in the ancient land and yatvyazhskih adjacent territories, hitherto maintained a particular yatvyazhskogo language. Thus, we examined two of the five "dead" languages of the Baltic Sea. With the continuation of the themes you can find in the article "Historical information about the" dead " Baltic languages. Part II .