Common European Framework of Reference for Languages

The Common European Framework of Reference for Languages: Learning, Teaching, Assessment, abbreviated in English as CEFR, CEF, or CEFRL, is a guideline used to describe achievements of learners of foreign languages across Europe and, increasingly, in other countries. The CEFR is also intended to make it easier for educational institutions and employers to evaluate the language qualifications of candidates for education admission or employment.

Source: Wikipedia — Common European Framework of Reference for Languages (CC BY-SA 4.0)