An Encyclopedia of Royal Knowledge
Have you ever tried to write to Prince Joachim, his wife or his sons?
I have written to Prince Joachim and his family a few times (Prince Nikolai's 18th Birthday, Prince Felix's confirmation, etc.) and never got a reply.
I write to Her Majesty in french (because i know she speak french) and i receive the same message but in french. I suppose they answer to people in the language the wrote (at least in french, danish or english)