- Wiktionary, English edition, CC-BY-SA-4.0
Wiktionary contributors (Wiktionary, English edition), extracted with Wiktextract (Wiktextract, Tatu Ylonen) and DBnary (DBnary, Gilles Sérasset, CC BY-SA 3.0)
- wordfreq, CC-BY-SA-4.0
wordfreq 3.2 by Robyn Speer, data under CC BY-SA 4.0. Includes data from Wikipedia, OPUS OpenSubtitles 2018 (OPUS OpenSubtitles), the SUBTLEX word lists by Marc Brysbaert et al., Google Books Ngrams (Google Books Ngrams), ParaCrawl and the Leeds Internet Corpus.
- Tatoeba, CC-BY-2.0-FR
Tatoeba contributors (Tatoeba). Each sentence names its author.