Hi @Tom,
Sorry for the delay in responding.
This is not an osTicket Awesome issue, it is an issue with osTicket itself. In fact, I opened a Git Hub issue report regarding this in October: Translations Missing #5098.
I find it very odd that so few people are complaining about this glaring issue. You may want to add your voice to that thread to nudge the devs into prioritizing it. Once they release a fix it will be integrated into osTicket Awesome immediately.