Demo Update 2026/01/03: Bug fixes and Japanese UI translation

[p]Added Japanese translations for the UI. This does not include the story and most of the archive entries. [/p]
[p]Fixed a bug where returning to the title would cause levels to be unable to load.[/p]
[p]Fixed a bug where the selected locale would not be saved.[/p]
[p](Possibly?) Fixed a bug where the character placements in the hub area would be stuck at the center of the map. (Unverified, unable to reproduce consistently. )[/p]