D&D Next Domains
Some believe it was the gods themselves who handed down language and the written word - and given the power inherent in the idea of little squiggly lines representing entire ideas, that belief perhaps has some basis in faith. Regardless of the truth, there are those gods who value the power of the word. These gods might grant their faithful champions access to this Domain.
At 1st level, you gain the cantrip message and vicious mockery. You also gain proficiency with calligrapher's supplies. Finally, it takes you half as long to train proficiency in new languages.
You gain advantage to any saving throws against malicious effects caused by reading, seeing, touching, or walking near books and writing. You can also flawlessly comprehend the meaning of any written word you encounter, allowing you to read any writing not protected or obscured by magic. You do not gain the ability to speak or understand the language when spoken. You do not automatically understand coded or ciphered messages, but your understanding of innate meaning to such texts does grant you advantage on checks to attempt to decipher them. This ability extends to trail symbols, way marks, and all symbol sets with an established meaning intended to communicate something between author and reader, even if it is a private symbol used by just two people.
Additionally, you gain advantage on checks to read scrolls of a spell level higher than you can use. You can also use the spells of another class list if they are on scrolls and of a level that you can normally cast. You must make a Wisdom check DC 12 + level of the spell in order to successfully do so, with failure causing the spell to fade from the scroll as normal.
Channel Divinity: Power of the Word
Starting at 2nd level, you can use your Channel Divinity to empower magical scrolls you read. When using a spell scroll, instead of the scroll being consumed when you read it, you may expend a use of your Channel Divinity ability instead. When doing so, you may use your own Spell Save DC for such magics if it is better than that which is innate to the spell scroll. This can only be used on spell scrolls containing spells on the cleric spell list that are of a level you can cast.
Channel Divinity: Gift of Tongues
At 6th level, you can use your Channel Divinity to bless others with the ability to understand one another. When you expend a use of your Channel Divinity ability, you can grant everyone you can see within 60 feet that ability to speak and understand one language of your choice that you can speak. Everyone affected is aware that you are the source of this gift, and is aware of the language they are speaking. This blessing lasts for one hour.
Starting at 8th level, you add your Wisdom modifier to the damage you deal with any cleric cantrip.
The Universal Language
At 17th level, you are attuned to the Universal Logos, the ur-language that is the progenitor of all languages. You can immediately understand all language in any context - codes unravel themselves when you see or hear them, you immediately discern the spell a spellcaster is in the middle of casting and you can speak any languages that are still in existence (though dead ones remain so).