The real ancient Lithuania is the territory of modern Belarus. The real Lithuanian language is a Slavic language, in which the documents of the Grand Duchy of Lithuania were written. Today's Lithuania is until the middle of the 19th century -- Samogitia, the outskirts of the Grand Duchy of Lithuania, which, with the assistance of the Russian Empire's authorities, was given a foreign name. You can make sure of it on any map older than the 19th century.