Backwards or back words

if you write left to right then reading the word in the opposite direction is back words or backwards .

if you associate time travel then back words can be applied to travel to the past

alphabetical order

right to left or left to right is in alphabetical order depending on your language rules .

whatever the rules the opposite direction of read is backwards.

all languages can be associated forward and backwards its just at the minute we dont give any further reason to language other than written forwards or read backwards .

we can applicate language to provide power from truth

create your own languages

if you create your own language you apply the rules ! 

applying time travel to language rules is just one theme that can be applied to make conscious sense . . forward to to future backward to the past . machines can be built with these rules

another use or theme is to envoke emotions or memory . forward to the future (planning) backward to the past (reminiscence)  

reversal of symbols

another way to look at at backward language is to utilise the reversal of symbols . 

some symbols reverse the same ( A A ) some symbols reverse backward or different ( t f )

reversal of symbols and rotations cover palindromical spell . once you have the foundation you just apply the meaning . you language your rules !