Added missing translation.

languages/en.ini

@@ -926,6 +926,7 @@ unique_tags = "Unique Tags"
 unique_tags = "Unique Tags"
 University Library = "University Library"
 Unknown = Unknown
+unrecognized_facet_label = "Other"
 Upgrade VuFind = "Upgrade VuFind"
 upgrade_description = "If you are upgrading a previous VuFind version, you can load your old settings with this tool."
 URL = URL

module/VuFind/src/VuFind/Search/Base/Params.php

@@ -993,7 +993,7 @@ class Params implements ServiceLocatorAwareInterface
     public function getFacetLabel($field)
     {
         return isset($this->facetConfig[$field])
-            ? $this->facetConfig[$field] : "Other";
+            ? $this->facetConfig[$field] : 'unrecognized_facet_label';
     }
 
     /**