I might have found the solution for your translations not showing up. At first I thought, “Content” wasn’t translated, because it is a module name. But I stumbled upon an OPCache issue in the Babel addon, where the updated language files didn’t show up properly after including them again. So I invalidate these files for OPCache now on save in the latest version 0.3.2.
You can check, if OPCache is enabled, by going to “Settings” → “System info”, click “PHP” tab, scroll to bottom, see “OPCache Enabled”.
For reference: