minecraft-expanded-datapack/pack.mcmeta

{
  "pack":{
    "pack_format": 7,
    "description": "Files for UndeadMaelys' Minecraft Expanded Pack"	
   },
	"language":{
		"undeadm-m2:en_us":{
			"name": "English",
			"region": "Undeadmaelys' Minecraft Expanded"	
		}
	}
}