Translations:API:JSON version 2/54/en

If you see missed opportunities to make the above changes in existing $1 output, or if there are other changes that would make API output easier to use in JSON, please let MediaWiki API developers know! Phabricator would be ideal (tag with #MediaWiki-Action-API, and the appropriate extension's tag if applicable), or reply on the mediawiki-api mailing list.