This mod adds loading tips which you can customize with a file in a resource pack called "assets/modid//loading_tips/tips.json"

{
 "replace": false,
 "tips": [
  "text.loadingtips.tip.nether_bed",
  "text.loadingtips.tip.milk",
  "text.loadingtips.tip.iron_golem"
 ]
}

Other mods can add the tips.json as showed above to easily add tips that will be shown when loading screen tips is installed.

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These tips are translation keys, so the text can be defined in lang files (Ex: en_us.json)