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In page Old Norse:

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In the 11th century, Old Norse was the most widely spoken European language, ranging from Vinland in the West to the Volga River in the East. In Kievan Rus', it survived the longest in Veliky Novgorod, probably lasting into the 13th century there.[2] The age of the Swedish-speaking population of Finland is strongly contested, but Swedish settlement had spread the language into the region by the time of the Second Swedish Crusade in the 13th century at the latest.[citation needed]