Latvian Sometimes referred to as Lettish, is the official state language of the Republic of Latvia. There are about 1.4 million native Latvian speakers in Latvia and about 150,000 abroad. Latvian belongs to the Eastern Baltic sub-group of the Baltic language group in the Indo-European language family. Of the Baltic languages, only Latvian and its closest relative Lithuanian remain. However, while related, the Latvian and Lithuanian vocabularies vary greatly from each other and are not mutually intelligible.