Elytra equipping subtitle has grammar mistake
What I expected to happen was...:
Elytra equipping subtitle would be "Elytra rustles"
What actually happened was...:
Elytra produces the subtitle "Elytra rustle"
Steps to Reproduce:
1. Right-click using an Elytra to equip.
2. The subtitle "Elytra rustle" will appear.
Linked issues
Comments

Nope, it is not incorrect. "Elytra" is the plural of "elytron", which is a type of (fore)wing present in some beetles. Thus the correct verb form is "rustle".