Filing this bug on behalf of Alexandros and Kostas. Please add Alexandros to the scm_l10n group. Alexandros has an account from bug 885455, hg bug 886012. Kostas vouched in email to add Alexandros to the folks with l10n hg access. Given that we have all the paperwork ahead of time, directory over to server ops.
Key added, hg enabled, scm_l10n group added to account firstname.lastname@example.org. Please allow a short time for the changes to propagate.