What do you mean by translations? giffgaff displays in English only, except when somebody intentionally writes in a different language. Nothing gets translated automatically.
I assumed that was what the member entered for the title when the thread was started. Though I remember that thread from replying to it earlier -- it's the one at https://community.giffgaff.com/d/33101806-unwanted-calls-from-overseas-suddenly-appearing-on-my-account
When I go to that thread, I'm seeing a reasonable title for it. So it looks like a random problem rather than a permanent corruption.
The problem went away for a bit yesterday (07/04/2020)
However its happening again today much more frequently.
The first bad email I received today was sent: at Wed 08/04/2020 10:26
They're called translations or localisations or locales in programming because they translate from an identifier (fof-follow-tags.index.follow_tag_button) to the user language (Follow), making it easier to change text across the site.
Nothing to do with different Language.
Some of the emails are having subjects like:
that’s what I thought 💭
Yup. The IDs aren't being converted to English properly for some reason.
It's only happening for emails about followed tags: it's something to do with that plugin.
This happened to me today mrjeeves
We know what's causing this to happen, and when it does happen we can fix it quickly in the short term. A long term permanent fix is in development.