Language names showing up wierd

In the language menu, it usually shows up like this

Pirate Speak (PIRATE)
English (US)
English (CA)

Now it appears with its name that is held in the txt file except for US english.

Pirate Speak (en_PT)
English(US)
English(en_CA)

Small bug, but it can lead to confusion.

Steps to reproduce:
1.) Open Minecraft.
2.) Go to "Languages"
3.) Observe