Wrong item name
Describe the bug Item is showed as item..justtest:hammer
To Reproduce Steps to reproduce the behavior: Used all command to create, add, and pack my ressources Files used included
Expected behavior Should show right item name => "Big Hammer"
Actual behavior Item is showed as "item..justtest:hammer"
Screenshots

Version info (please complete the following information):
- OS: W10
- PocketMine-MP Version: 1.16.220
- CustomItemLoader Version: 2.0.2
Additional context Config file used config.yml.zip Ressource pack test.mcpack.zip
try to edit your language file with your correct namespace and item name.
my plugin only provides en_US language file, if you are using other language you should add your language file to resource pack.
Could you implement the generation of the text for all languages ?
Although you may have already solved: Use item.justtest:hammer=hammer instead of item.justtest=hammer in en_US.lang.
And I think that supporting all languages depends on resource packs, not plugins.
For example create ja_JP.lang and it should work fine.