I assume the course name follows the phrase 'Are you sure you want to unregister from'

What you need to do here is:
1. Put this string on its own line
2. Add a translator comment above this string saying "Translators: The course's name will be added to the end of this sentence."
3. Do the same for the similar phrases at L119 and L121.

ALTERNATIVELY, find a way to explicitly sub in the course's name to the sentence so the translators can more properly translate this according to their language's rule.