The message growthexperiments-exception-no-mentored-text has no gender support. It is somewhat seen even in English, where the "they" pronoun is used; with gender support, it could also be "he" or "she". And in some other languages, it's needed even more.
Guidance:
- Add $username argument to UserNotMentoredException.
- Pass it to the parent's constructor (in an array as the third argument).
- Update all usages to pass the username.
- Change growthexperiments-exception-no-mentored-text in i18n/mentorship/en.json to something like User has no mentor, which means {{GENDER:$1|he|she|they}} cannot ask {{GENDER:$1|his|her|their}} mentor a question
- Document the parameter in i18n/mentorship/qqq.json.