add language hash

lib/constants.js

@@ -233,6 +233,8 @@ export const LANGUAGES = [
   }
 ]
 
+export const LANGUAGE_HASH = toHash(LANGUAGES)
+
 export const DEFAULT_LANGUAGE = { name: 'Auto' }
 
 export const COLORS = {
@@ -261,3 +263,13 @@ if (typeof window !== 'undefined' && typeof window.navigator !== 'undefined') {
     }
   })
 }
+
+function toHash (list) {
+  return list.reduce((accum, item) => {
+    if (item.module) {
+      accum[item.module] = item
+    }
+
+    return accum
+  }, {})
+}