As a way to distance itself from the Italianization policies promoted because of nationalism, Italy recognized twelve languages as the Country's "historical linguistic minorities", which are promoted alongside Italian in their respective territories. French is co-official in the Aosta Valley as the province's prestige variety, under which the more commonly spoken Franco-Provencal dialects have been historically roofed. German has the same status in the province of South Tyrol as, in some parts of that province and in parts of the neighbouring Trentino, does Ladin. Slovene and Friulian are officially recognised in the provinces of Trieste, Gorizia and Udine in Venezia Giulia. In Sardinia, the Sardinian language has been the language traditionally spoken and is often regarded by linguists as constituting its own branch of Romance; in the 1990s, Sardinian has been recognized as "having equal dignity" with Italian, the introduction of which to the island officially started under the rule of the House of Savoy in the 18th century.