Problem:
Check all the checkbox in the Translation Editor
Solution:
– Backup your site
– Load the Translation editor page
– Go to Chrome->More Tools -> Developer Tools -> Console https://developers.google.com/web/tools/chrome-devtools/console/
– Paste the following code and click enter
(function() {var aa = document.querySelectorAll("input[type=checkbox]");for (var i = 0; i < aa.length; i++){aa[i].checked = true;}})()
– Now save the post.