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
Duplicate of MC-13979, please use the search function to see if your bug has already been submitted. Currently over 56% of tickets are being closed as duplicate.