Swiss German refers to any of the Alemannic dialects spoken in Switzerland and in some Alpine communities in Northern Italy. Occasionally, the Alemannic dialects spoken in other countries are grouped together with Swiss German, as well, especially the dialects of Liechtenstein and Austrian Vorarlberg, which are closely associated to Switzerland's. Linguistically, Swiss German forms no unity. The linguistic division of Alemannic is rather into Low, High and Highest Alemannic, varieties of all of which are spoken both inside and outside of Switzerland. The reason "Swiss German" dialects constitute a special group is their almost unrestricted use as a spoken language in practically all situations of daily life, whereas the use of the Alemannic dialects in the other countries is restricted or even endangered.