Expand config for localisation

webpack.mix.js

@@ -11,5 +11,16 @@ let mix = require('laravel-mix');
  |
  */
 
+const WebpackShellPlugin = require('webpack-shell-plugin');
+
+// Add shell command plugin configured to create JavaScript language file
+mix.webpackConfig({
+                      plugins:
+                          [
+                              new WebpackShellPlugin({onBuildStart:['php artisan lang:js resources/assets/js/messages.js --no-lib --quiet'], onBuildEnd:[]})
+                          ]
+                  });
+
+
 mix.js('resources/assets/js/app.js', 'public/js')
    .sass('resources/assets/sass/app.scss', 'public/css');