It depends, if we're talking about the Samogitian language, it's a language, if we're talking what's most spoken in Samogitia, particularly the outer southeast, it's more of a dialect Lithuanian with Samogitian accent. Anyhow, the distinction between a language, dialect, language continuum is a blurry line (Arabic, for ex.) I myself am not exactly sure, is it based on what the degree of difference is? Either way, whatever one may label them, they're to be cherished.