Linguist
You have studied languages and codes, gaining the following benefits:
• Increase your Intelligence by 1, to a maximum of 20.
• You learn three languages of your choice.
• You can ably create written ciphers. Others cannot decipher a code you create unless you teach it to them, they succeed on an Intelligence check (DC = your Intelligence score + your proficiency bonus), or they use magic to decipher it.