Lithuanian (lietuvių kalba) is the official state language of Lithuania and is recognized as one of the official languages of the European Union. There are about 2.9 million native Lithuanian speakers in Lithuania and about 300,000 abroad. Lithuanian is a Baltic language, closely related to Latvian, although they are not mutually intelligible. It is written in a Latin alphabet. The Lithuanian language is believed to be the most conservative living Indo-European language, retaining many features of Proto-Indo-European now lost in other Indo-European languages.
( you should hear these people swear though )