Language switcher with short language notation

@TonHaarmans, Try the following steps:

• Copy file /user/plugins/langswitcher/templates/partials/langswitcher.html.twig from the Langswitcher plugin, into your inherited theme's folder /user/themes/mytheme/templates/partials/.

• In that copied file, on line 26, replace {{ native_name(language)|capitalize }} with {{ language|upper }}:

  Resulting in:

  TWIGCopy

  <li><a href="{{ lang_url ~ uri.params }}" class="external{{ active_class }}">{{ language|upper }}</a></li>
  

Please note that you should make the changes in an inherited theme, else your changes will be lost when Langswitcher gets updated.