Version Info

• Minecraft, ... 1.21 fabric
• Simple Magnets, ... 1.1.11

Description of the Bug
...
trinket slot don't using

trinkets slot path replace data/trikets/tags/item/hand/ring.json
items -> item

translation key need change
example "gui.advancedmagnet.title": "고급 자석", ->
this.translation("simplemagnets.gui.magnet.title", "고급 자석");

Steps to Reproduce
...

Screenshots
...

The Trinkets slots should be fixed now in Simple Magnets version 1.1.11a/b.

translation key need change
example "gui.advancedmagnet.title": "고급 자석", ->
this.translation("simplemagnets.gui.magnet.title", "고급 자석");

I don't do translations for other languages, they are all submitted by people in the community. If you want changes to the translations, you can submit a pull request.
That being said, there is currently already a pull request for it (#57), so will likely be updated not too long from now.

Thank you for reporting the issue!