Merge cbz chapter into one cbz per volume
Modify line two to match your current folder of folder of your mangas you want to merge
Current format MUST be :
"Title -- Volume xxx - Chapitre yyy - Title zzz.cbz"
You can modify the regex at line 55 to match your current format
IF SO, also modify the line 142 if you change "Chapitre" to "Chapter" for example
OR
Use Bulk Rename Utility (https://www.bulkrenameutility.co.uk/) or use any software for mass renaming.