Latvian language
The Middle dialect is spoken in central and Southwestern Latvia. Kursenieki language, which used to be spoken along Curonian Spit, is closely related to the varieties of middle dialect spoken in Courland. The dialect is divided into the Vidzeme variety, the Curonian variety and the Semigallian variety. The Vidzeme variety and the Semigallian variety are closer to each other than to the Curonian variety, which is more archaic than the other two. There are three intonations in the Middle dialect. In the Semigallian variety, "ŗ" is still used. Standard Latvian is based on the middle dialect.
Russians in Latvia
Russians were the main ethnic group in the USSR both in number and in political influence. Under the conditions of Soviet Latvia, Russian culture dominated the whole non-Latvian population of the Republic. The Russian language also formed a new group of Russian-speaking Belarusians, Ukrainians, Poles, Jews and Germans of Latvia. In the period of 1959–1979 the number of ethnic Russians in Latvia increased by 47%, but the number of non-Russians considering Russian their mother tongue increased by 78%. A highly developed infrastructure was developed in Latvia on the basis of the Russian language: a broad system of secondary and higher education, science and mass media.