CEFR and its language versions
Common European Framework of Reference for Languages (2001)
Albanian version (versioni shqip) (2006)
Arabic version (النسخة العربية) (2006)
Catalan version (versió catalana) (2003)
Czech version (česká verze) (2002)
Danish version (dansk version) (2018)
Dutch version (nederlandse versie) (2008)
Estonian version (eestikeelne versioon) (2007)
Esperanto version (esperanta versio) (2007)