Depends on the definition, and final decision of linguists. It's an ongoing controversy in Poland for two languages / dialects: Kashubski language and Silesian

Depends on the definition, and final decision of linguists. It's an ongoing controversy in Poland for two languages / dialects: Kashubski language and Silesian language. Both are strictly used only by regional minorities, both are not understood well by Poles from other areas, and both have German influences. Kashubski is mostly called a language, even thought it's not officially recognized as a regional language (you can't expect to use it in for official matters). Silesian is mostly called a dialect/subdialect, but there's a regional movement to elevate Silesian to a separate language through political means.