Steps to reproduce:

1. Open any Wikipedia main page (e.g. Indonesian Wikipedia)
2. Look at the language selector on the left side of the page
3. Find the Banjar Wikipedia and you will see language name on the selector is "Bahasa Banjar"

Actual result:

The language's name on the selector is written "Bahasa Banjar"

Expected result:

The language's name should be written "Banjar" only, based on a community consensus on Sundanese Wikipedia's village pump. This also applies to the language selector on top of page, located next to the username.

There are very similar tasks on autonomic changes in the past: this, this, and this.