| en-5 | This user is able to contribute with a professional level of English . |
| en-4 | This user speaks English at a near-native level. |
| en-3 | This user is able to contribute with an advanced level of English. |
| en-2 | This user is able to contribute with an intermediate level of English. |
| en-1 | This user is able to contribute with a basic level of English. |