Questions & Answers about Dit bly privaat.
Here bly means remains / stays.
So Dit bly privaat means something like It remains private or It stays private.
This is a very common use of bly in Afrikaans:
- bly kalm = stay calm
- bly stil = stay quiet
- bly oop = stay open
Be careful: bly can also mean live/reside in other contexts:
- Ek bly in Kaapstad = I live in Cape Town
So the exact meaning depends on context.