I think this work in this way:
You have the list of words and the list of phrases ok?.
Each word is identified by the number in the left part.
For example "aqui" have the code 0x69 as you can view in the file.
So knowing the numbers you can mount phrases with the numbers 69 xx xx xx etcc.
To change the text you need change the words editing it normally. And made it match, so probably you need change the phrase. I mean change the numbers of phrase.
Really is not dificult, to change a combination of words in phrase search the old number combination, and change it with your creation in numbers
I have explained ok?.
Example:
0x01 -> 0E F9 0F F9 10 11 12 F9 11 13 FE 14 FD 15 16 17 18 19 F9 1A FD 1B 1C F9 1D 1E 1F FF
BIENVENIDO A ESTA ABADIA, HERMANO. OS RUEGO QUE ME SIGAIS. HA SUCEDIDO ALGO TERRIBLE
0e= bien f9=code incomplete word(not add space) [size=78%]0f=venid f9=code incomplete word 10=o[/size]
So if you search with hex editor "oe,f9,of,f9,10" and you change it to 10,f9,of,f9,oe you put "ovenidbien"
If you change the alone word "bien" but no the phrase to abcd the he write. "Ovenidabc"