After a SP2010 with Danish language pack migration to SP2016 with Danish language pack, the SP default list contenttype names are not localized for Danish but instead pointing to ex $Resourcescmscore,contenttype_welcomepage_name;
The correct path to a ressourcefile would be with a colon after $Resources ex.
$Resources:cmscore,contenttype_welcomepage_name;
The en-US locale is showing the correct name.
Does Content Matrix not support localization?