As I've said in my post, the script is around (or a little over) 11k words.
I'm not using any specific software and I surely won't ask you to buy anything! You will work on a google sheets file, easy to access and edit.
Honestly, if you think you can translate the demo at least by the end of the year, then I can already send you the translation sheet.
Just send me a friend request on discord (preferably) or an email when you're available and I'll give you the link ^^