Implementing Json for dialogue system?

I'm in a bit of a dilemma currently I'm making an rpg which of course has a dialog system (lol) but I'm not sure if I should use Json file to store my dialogue message or hard code it into an array of string. I really like the idea of using Json since I can also ask my friends to chip in their "dialogue" but problem is it can be easily edited.

TL:DR

~Is there a way to encrypt the Json file or should I just hard code it?

~Or is there other way of doing it?

Thanks in advance

Sorry for the bad english.