To a large extent, the Lithuanian nationalist movement of the late nineteenth century was founded on language. Although this is typical of many nationalist movements, the Lithuanian case was special because of the amount and type of attention that was focused on the Lithuanian language, and the qualities that were ascribed to that language. This article discusses the influence that scholarly research into the Indo-European language family, in combination with the romantic nationalism typical of the nineteenth century, exerted on Lithuanian nationalists, and considers the symbolic importance of the Lithuanian language for this movement as a whole.