5e language headcanons
Celestial is written in Pictographs with multiple meanings for each one depending on the context and when it was written. There usually is a date signed with the writing to allow readers to match it with the particular alignment of the heavens that day and decipher. Spoken aloud it sounds like Fantasy Latin.
Abyssal, despite the chaotic nature of its main users, is structured most akin to Mathematics. Words and phrases alone have meaning, but sentences and similar structures have no meaning if taken literally, and the whole of the passage must be deciphered based upon a specific qualifier given somewhere within the writing/speech. Spoken aloud it sounds garbled until the defining word or phrase is given.
Infernal is a mix of the two, coming upsettingly close to Algebra. No one likes Infernal.
