ULS UI language selector will need to be called from the compact personal bar beta feature https://www.mediawiki.org/wiki/Compact_Personal_Bar
in this state it should be opened as a modal dialog. at minimum this should use the existing styling of the dialog minus the "pokey" on the edge. But ideally it would use the new mediawiki.ui styling https://trello.com/c/uAoYLKf1/3-modal-dialog.
Version: unspecified
Severity: normal