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.
Latvia
In the post-war period, Latvia was made to adopt Soviet farming methods. Rural areas were forced into collectivisation. An extensive programme to impose bilingualism was initiated in Latvia, limiting the use of Latvian language in official uses in favour of using Russian as the main language. All of the minority schools (Jewish, Polish, Belarusian, Estonian, Lithuanian) were closed down leaving only two media of instructions in the schools: Latvian and Russian. An influx of labourers, administrators, military personnel and their dependants from Russia and other Soviet republics started. By 1959 about 400,000 people arrived from other Soviet republics and the ethnic Latvian population had fallen to 62%.