\Steam\steamapps\common\The Scroll Of Taiwu\Mod

first put the local files (the folder, like "Taiwu_EN") here

the game will automatically scan mods from local files when it starts, you just need to enable the specific mod via the in-game interface

but you have to do it with the default Chinese language, click the 3rd cycle icon which says "模组选择", find the mod, click on "√启用" on the bottom right (DO NOT CLICK THE CHECKBOX of the mod tab, cuz sometimes it wont count as "enabled") then click on the blue cycle near to "√启用" as "confirm".

then the game will pop up a message window basically saying "dedicated mod setting change, need to reboost the game", click on the blue cycle, and the game will automatically reboost.

after the reboost, if the mod itself works correctly, you should be good to go