https://vocabularyserver.com/unesco/en/https://vocabularyserver.com/unesco/en/xml.php?skosTema=2969Uncommonly taught languages https://vocabularyserver.com/unesco/en/xml.php?skosTema=2969 Languages BT https://vocabularyserver.com/unesco/en/xml.php?skosTema=2969 Linguistic rights RT https://vocabularyserver.com/unesco/en/xml.php?skosTema=2969 Language instruction RT https://vocabularyserver.com/unesco/en/xml.php?skosTema=2969 Less widely used languages UF