When I post news in here if I just use text/ words the gener.. (OnlyFans)

When I post news in here if I just use text/ words the general public can read it and I only want my subscribers to be privy to this info .... 
 
 So I thought to use voicenotes which is pretty satisfactory as public cant access these BUT people who are subscribed who's first language isnt English cant understand a voicenote 
 
 They can only copy n paste text into a translator 
 
 Help??