Latvian language, like most languages of modern Europe, has a distinct Indo-European character of expressions. Presumably, the South Baltic to the XX century. BC was a nucleus of settlement Nordic peoples, generally speaking the ancient Baltic-German-Slavic language. Between XX and X centuries BC. e. decay occurs in the western group - the German and eastern - Baltic. It is common during the past baltic unity explains why the Slavic languages (including modern Russian), so close to the Baltic languages. The period ends baltic unity between X and V cc. BC. e., then slow the differentiation of these two groups. Balta remain concentrated mainly in the coastal regions of the Baltic states, while the Slavic population inhabits vast continental expanses of Eurasia in the next 20 centuries. Notably, the modern Baltic languages retain a number of Indo-European archaism, lost in other languages (including Russian). Nevertheless, because of the continuing geographical proximity, intense trade and cultural exchange between the Baltic and Slavic peoples, and consequently the language exchanged between the Slavic and Baltic languages continues until the XII century, but was suspended for some time in connection with a strong German influence in XII-XVIII centuries. The influence of Russian and Polish part in the Latvian language was resumed after the XVIII century. Russian influence is particularly noticeable in some regions of Latgale, as well as in urban areas. Because of the long and continuing contact between the Baltic and Slavic languages are sometimes difficult to delineate what features of the Latvian language dated to the period of total Baltic-Slavic unity, which developed as a result of contact languages in the Middle Ages and the new time.