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In page T–V distinction:

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A T–V distinction was once widespread in the North Germanic languages but its use began rapidly declining in the second half of the 20th century,[1][2] coinciding with the 1960s youth rebellion.[2] The V variant has in practice completely disappeared from regular speech in Swedish spoken in Sweden[citation needed], Norwegian and Icelandic.[1] In Faroese and Finland Swedish, however, it is still occasionally used.[3]