It's not currently possible to login to the SVG Translate tool in production.
When accessing the log-in action in the SVG translation tool, I get redirected to the OAUth process, but the log-in seems not to take effect: The log-in option is still there (instead of my username or a log-out option, that I would expect when logged in) and the upload to commons option is disabled.
The animation below illustrates the issue: