The Common European Framework of Reference for Languages (CEFR)

A1 Communication in basic language

A2 Everyday conversations on familiar topics in simple language

B1 Effective communication about everyday topics

B2 Active participation in discussions on different subjects

C1 Effective communication about complex topics, only occasionally unsure

C2 Fluent or near-fluent use of language even in complex situations

Placement tests

Online placement tests (German language only) for German, English, Italian, French and Spanish can be found on the pages for those languages.

Learn more about the CEFR

Wikipedia