Button Text in Language Tab

Description
The button text in the Language tab lacks consistent capitalization. Additionally, some of the languages are displayed in their native script/style while others are in English, leading to inconsistency in presentation.

Describe the solution you'd like

The first letter of every word in the button text should be capitalized (e.g., "Swedish" instead of "swedish") for consistency.
Language names should either be uniformly displayed in their native script/style or in English, with clear guidelines applied across the tab.

Start from the Language tab implementation and inspect how its button labels and language names are defined. Standardize capitalization and apply one consistent language-name presentation rule across the tab; verify every displayed language and button matches the chosen convention.

Written by the indexing model from the issue text.