There is no difference between the first (prior to the mobility period) and the final (upon return from one’s mobility) OLS language assessment. However, the assessment is adaptive and therefore the questions might be different. Because both assessments are based on the same principles, it is possible to measure the improvement of your language skills during your mobility period.
Please note that if you obtained a score of C2 in your first language assessment, you will not have to take a final assessment. You will therefore not receive an invitation to take a final assessment.