Enable Spanish (#913)

app/javascript/dashboard/i18n/index.js

@@ -2,6 +2,7 @@ import ca from './locale/ca';
 import de from './locale/de';
 import el from './locale/el';
 import en from './locale/en';
+import es from './locale/es';
 import fr from './locale/fr';
 import nl from './locale/nl';
 import ml from './locale/ml';
@@ -14,6 +15,7 @@ export default {
   de,
   el,
   en,
+  es,
   fr,
   nl,
   ml,