First think that Preserved Tablet is different from Quran. Many belief/faith Loha-e-Mehfooz is Quarn but not truth. This a divine preserving tablet in which the things that happened and are to happen, all moments in time and all beings in space, in short, everything is written on; it is the mirror of Divine knowledge, the book of fate and the program of the universe.
Everything has been written down and kept in it (36:12).
It is a register where there is the knowledge of everything that has happened and will happen (50:4).
It is a notebook where everything that has happened and will happen to every being eternally exists (57:22).
you will get more clear ideology/dogma ,hope so.
from loh-e-mehfooz ,we only knowledge about that which told/taught by Hazrat Mohammad(s.a.w), so i think no reference occur about language.
Many scholars having faith that loh-e-Mehfooz is like man's memory .Memory contains the events that we experience, the places that we see, people that we know, voices that we hear, tastes that we taste, all impressions that we receive all our life long, all knowledge that we learn, but it still never becomes full.