Como o classificador de nível do LingoCherry funciona

Referências

1. Council of Europe (2001). Common European Framework of Reference for Languages (CEFR). Cambridge University Press.
2. Council of Europe (2020). CEFR Companion Volume — updated descriptors. Council of Europe Publishing.
3. Speer, R. (2022). rspeer/wordfreq: v3.0. Zenodo.
4. Nation, I. S. P. (2006). How Large a Vocabulary Is Needed for Reading and Listening?. The Canadian Modern Language Review, 63(1), 59–82.
5. Zipf, G. K. (1949). Human Behavior and the Principle of Least Effort. Addison-Wesley.
6. North, B. (2014). The CEFR in Practice. Cambridge University Press.