Level 1: Elementary Proficiency
1 - Able to satisfy minimum courtesy requirements and maintain very simple face-to-face conversations on familiar topics.
1+ - Can initiate and maintain predictable face-to-face conversations and satisfy limited social demands.

Level 2: Limited Working Proficiency
2 - Able to satisfy routine social demands and limited work requirements.
2+ - Able to satisfy most work requirements with language usage that is often, but not always, acceptable and effective.

Level 3: General Professional Proficiency
3 - Able to speak the language with sufficient structural accuracy and vocabulary to participate effectively in most informal conversations on practical, social, and professional topics.
3+ - Is often able to use the language to satisfy professional needs in a wide range of sophisticated and demanding tasks.

Level 4: Advanced Professional Proficiency Plus
4 - Able to use the language fluently and accurately on all levels normally pertinent to professional needs.
4+ - Speaking proficiency is regularly superior in all respects usually equivalent to that of a well-educated, highly articulate native speaker.