Small translations as a basic start [skip ci]

resources/lang/nl/firefly.php

@@ -1,5 +1,14 @@
 <?php
+
+// general fields and things.
 return [
     'test'            => 'Nederlands geselecteerd!',
+    'close'           => 'Sluiten',
+    'pleaseHold'      => 'Momentje...',
+    'mandatoryFields' => 'Verplichte velden',
+    'optionalFields'  => 'Optionele velden',
+    'options'         => 'Opties',
+    'something'       => 'Iets!',
+    'actions'         => 'Acties'
 
 ];