If of is "ya" because mazungumzo is always plural, will the same be correct for maendeleo, which is also always plural? Therefore, would the pupil's progress become manedeleo ya mwanafunzi?
but 'mazungumzo' is not. Granted, no one says 'zungumzo', since 'mazungumzo' generally means 'talks. So it's always plural. Some words don't translate exactly