Should https://indico.cern.ch/event/****/registrations/****/ be i18n’d?
I tried to find strings like “Vehicle Registration” and “Request access to the CERN site” in the translatable strings within the POT files, but failed. Also a long grep through the HEAD of the master branch did not yield anything like that.

Currently the curious side effect is that the dropdown menu for country selection states:
“Country of birth” – and after failing to search under G and D (How could it have disappeared from the list?), I finally realised that it is A due to my fr/FR i18n setting.

We currently do not extract the strings of the CERN-specific plugins into transifex. So they are indeed always using the english default for now.