Attribution

TeachLex’s CEFR vocabulary analysis is built on the following open resources. We are grateful to their creators.

CEFR-J Wordlist

Vocabulary levels A1 to B2 draw on the CEFR-J Wordlist Version 1.5, developed by Yukio Tono, Tono Laboratory, Tokyo University of Foreign Studies. Used with citation in accordance with its terms.

Octanove Vocabulary Profile

Levels C1 and C2 draw on the Octanove Vocabulary Profile C1/C2, v1.0 (Octanove Labs), used under the Creative Commons Attribution-ShareAlike 4.0 International license (CC BY-SA 4.0).

New General Service List

Corpus balancing draws on the New General Service List (NGSL) 1.2, © Charles Browne, Brent Culligan and Joseph Phillips, used under the Creative Commons Attribution-ShareAlike 4.0 International license (CC BY-SA 4.0).

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