Latgalian language
Latgalian is spoken in Latgale, the eastern part of Latvia. It is debated whether it is a separate language or a distinct dialect of Latvian. Nevertheless, its standardized form is recognized and protected as a "historical variety of the Latvian language" "(vēsturisks latviešu valodas paveids)" by Latvian law. The 2011 Latvian census established that 8.8% of Latvia's inhabitants, or 164,500 people, speak Latgalian daily. 97,600 of them live in Latgale, 29,400 in Riga and 14,400 in the Riga region.
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.