Latvian language
Upper Latvian dialect is spoken in Eastern Latvia. It is set apart from rest of the Latvian by number of phonetic differences. The dialect has two main varieties – Selonian and Non-Selonian. There is a standard language, the Latgalian language, which is based on deep Non-Selonian varieties spoken in south of Latgale. The term "Latgalian" is sometimes also applied to all Non-Selonian varieties or even the whole dialect. However, it is unclear if it is accurate to use the term for any varieties besides the standard language. While the term may refer to varieties spoken in Latgale or by Latgalians, not all speakers identify as speaking Latgalian, for example, speakers of deep Non-Selonian varieties in Vidzeme explicitly deny speaking Latgalian.
Language policy in Latvia
The official language ("valsts valoda", literally "state language") in Latvia is Latvian; this status has been explicitly defined since 1988. In 1992, amendments to the 1989 Law on Languages strengthened the position of Latvian. All other languages, except the extinct Livonian language, are defined as foreign languages in Section 5 of the Official Language Law Law of 1999.