A language pack modifying en_us/American English to give items names matching their ID.

Some notable examples:

[minecraft:experience_bottle] Bottle o' Enchanting -> Experience Bottle

[minecraft:iron_block] Block of Iron -> Iron Block (same for every other material like diamond, redstone etc.)

[minecraft.cooked_beef] Steak -> Cooked Beef

[minecraft.leather_chestplate] Leather Tunic -> Leather Chestplate

[minecraft.writable_book] Book and Quill -> Writable Book

For the full list of the over 100 changed names please check the language file.