Version : 4.1.2
Minecraft : 1.16.4
Lang : zh_tw
Inside the /maps, the characters of titles are shown as garbled (except the name of items and western characters.)
If possible, shall I make a translation for zh_tw?

You should see #168 It's maybe related. We have a support for zh_CN but no zh_tw. If there are differences, feel free to add a translation.