Following my last update, @moecki highlighted that I hadn't introduced translations within my changes. I very much enjoy translating the content on each screen and I'm amazed that the previous developer chose to avoid this task (for those unfamiliar with sarcasm, this sentence contains more than just a hint of it).
So not only did I use the ever so helpful ChatGPT to translate the new content that I had migrated, I also used it to translate all of the other bits around the Communities functionality.
The content was translated into the currently available options: Spanish, French, Italian, Japanese, Korean, Polish and Russian.
I won't detail every change as it's all fairly uninteresting and straightforward. If you'd like to see the changes made, this is the GitHub commit.