Include Contributors in LOCALE.md file (#452)

* Include Contributors in LOCALE.md file

Co-authored-by: Rithvik Vibhu <rithvikvibhu@gmail.com>

LOCALE.md

@@ -73,4 +73,9 @@ npm run add-locale zh
 - When merging in a new locale json, be sure to update the dropdown list in `app/util/i18n.js` with the new locale.
 - When new keys are added to `en.json`, make sure to run `npm run add-locale` to extend new keys to existing locale json.
 
+## Languages
 
+| Language | Filename | Contributors |
+| --- | --- | --- |
+| Catalan | ca.json | Faltrum (@faltrum) |
+| Spanish | es-ES.json | Faltrum (@faltrum) |