Load language file in the onload callback.

src/Listener/Dca/LeafletDcaListener.php

@@ -12,6 +12,7 @@
 
 namespace Netzmacht\Contao\Leaflet\Listener\Dca;
 
+use Contao\Controller;
 use Contao\DataContainer;
 use Netzmacht\Contao\Leaflet\Model\LayerModel;
 use Netzmacht\LeafletPHP\Value\LatLng;
@@ -50,6 +51,16 @@ class LeafletDcaListener
         $this->cacheDir   = $cacheDir;
     }
 
+    /**
+     * Load the language files.
+     *
+     * @return void
+     */
+    public function loadLanguageFile(): void
+    {
+        Controller::loadLanguageFile('leaflet');
+    }
+
     /**
      * Create the zoom range.
      *