== Background
In T289716: Create sticky header skeleton we are building the skeleton for the sticky header. This task will cover adding the language switcher and ULS to the sticky header
== Acceptance criteria
Add the following items to the sticky header as per the prototype below:
[] Language switching button
- Selecting button should open the ULS
Note: this will only be available for wikis that have multiple language versions. Wikis with multiple languages on a single wiki (wikdata, mediawiki, etc) will not display a language selector within their sticky header
[] If ULS extension is not installed, do not show the ULS button in the sticky header. Do not spend time trying to wire up the fallback dropdown menu.
[] Make sure the new button is click tracked via DesktopWebClickTracking by having a data-event-name attribute
== Prototype
https://di-community-round-2.web.app/Audre_Lorde
# Developer notes
ULS will wire up any element with `mw-interlanguage-selector` . With that in mind, this change should be a hopefully trivial template change to StickyHeader.mustache. Note, the second acceptance criteria item which means the outputting of the language button should be conditional and should never behave as a dropdown.
== QA Results - Beta
| **AC** | **Status** | **Details** |
| ----- | ----- | ----- |
| 1 | ✅ | T289815#7505695 |
| 2 | ✅ | T289815#7505695 |
| 3 | ✅ | T289815#7505695 |
| 4 | ✅ | T289815#7505695 |
| 5 | ❓ | T289815#7505695 |