There are two patches to make Kobo ignore font-family and line spacing in epub. You have to enable them in two files: this is the related part of the Yaml file (see the instruction for patching, are more simpler to do than to explain)
https://www.mobileread.com/forums/sh...d.php?t=328052
Code:
src/libnickel.so.1.0.0.yaml:
Force user line spacing in ePubs (part 1 of 2): yes
Force user font-family in ePubs (Part 1 of 2): yes
Code:
src/librmsdk.so.1.0.0.yaml:
Force user line spacing in ePubs (Part 2 of 2): yes
Force user font-family in ePubs (Part 2 of 2): yes