"Level Requirement" message is not translateable

The "Level Requirement" message on enchantment tables is hardcoded and cannot be translated, even though the rest of the enchantment table messages are.

To reproduce:

1. Acquire an enchantment table and an enchantable item.
2. Make sure you have no experience levels.
3. Switch language to ɥsᴉꞁᵷuƎ (ɯopᵷuᴉʞ pǝʇᴉu∩), as that language has a 100% translation (and is pretty easy to compare).
4. Put the enchantable item in the enchantment table.
5. Hover over one of the enchant buttons. The message "Level Requirement: 2" (or similar) should be displayed in red, untranslated.