Hi
This sounds like an excellent solution, I read mostly Vietnamese books too and I would like to apply this fix for Kobo Libra 2 4.33.19611. However when I follow your video instructions and replace the Avenir & georgia code and copy the fixed firmware to my kobo libra 2, it hang and I have to do a factory reset. Is it possible for you to create a fixed firmnware for kobo libra 2 and firmware 4.33.19611? The kobo's firmware is here
https://pgaskin.net/KoboStuff/kobofirmware.html
Thank you
M