Are there any open source data for English words by CEFR level?

I found https://www.oxfordlearnersdictionaries.com/wordlists/oxford3000-5000 , which categorizes English words based on CEFR level, but it has license.


Cambridge University Press is making the A1-C2 English Vocabulary Profile available free of charge to teachers and educationalists around the world. Go to EVP Online to access the resource.

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Maybe this word lists link is what you are looking for. It is a course with lists of words as pdfs categorized by CEFR levels.

Alternatively, you can use the EFLLex: A CEFR-graded lexical resource for English as a foreign language, which is open sourced but the you still must cite the original work/ authors.

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    Has license, needs to be open data – Arvand Jun 11 at 18:20
  • I just added a second option, which seem to be open sourced ;) hope it helps. – SuperKogito Jun 17 at 7:30

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