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. 2026 Jun 1;16(6):886. doi: 10.3390/bs16060886
Skill 1 2 3 4 5
Listening
Speaking
Reading
Writing
Note. 1 = No fluency (no understanding or speaking ability); 2 = Limited fluency (some understanding, can say short simple sentences); 3 = Somewhat fluent (good understanding, can express on many topics); 4 = Quite fluent (can understand and use language adequately for work and most situations); 5 = Very fluent (understands almost everything, very comfortable expressing in all situations).