The Common European Framework of Reference for Languages (CEFR) was developed by the Council of Europe. This framework identifies six levels of language proficiency in mastering foreign languages.

If you want to assess your CEFR level for any foreign language you can speak, you can take the dialang online test. This test is free and enables you to assess your level of proficiency (in reading, writing, listening, grammar and vocabulary) in 14 different languages.