Before Minecraft 1.13, if the language file of the corresponding language contains non-ASCII characters, all charactors will be rendered as unicode font style.
This mod will solve this issue.
A Custom Skin Loader for Minecraft
Fixed the compatibility issue between the CustomSkinLoader mod and the 3D Skin Layers mod since Minecraft 1.21.4
An unofficial port for AutoReconnected Fabric editon
Force the game display pixel font