Localization preference select has no accessible name

WCAG warnings in the test class [org.xwiki.localization.test.ui.AllIT]:
__________
Validation in the test method [changeLanguageInMonolingualModeUsingTheAdministrationPreference]
Check for [org.xwiki.administration.test.po.LocalizationAdministrationSectionPage] at [http://xwikiweb:8080/xwiki/bin/admin/XWiki/XWikiPreferences?editor=globaladmin&section=Localization].
Found [2] items

[...]

2: Select element must have an accessible name
Description: Ensures select element has an accessible name
Help URL: https://dequeuniversity.com/rules/axe/4.7/select-name?application=axeAPI
Help: Select element must have an accessible name
Impact: critical
Tags: cat.forms, wcag2a, wcag412, section508, section508.22.n, ACT, TTv5, TT5.c

HTML element: 
	<select multiple="multiple" class="form-control">
Selector: [select[multiple="multiple"]]
Fix any of the following:
  Form element does not have an implicit (wrapped) <label>
  Form element does not have an explicit <label>
  aria-label attribute does not exist or is empty
  aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty
  Element has no title attribute
  Element's default semantics were not overridden with role="none" or role="presentation"