Localization is now complete!
There are just two quirks to be aware of:
Network Sensor section name is hardcoded — due to API limitations, the section title can't be localized dynamically, as it only accepts plain strings and not localization keys.
Item quality tooltips are unlocalized — this is intentional. Since quality mods can introduce an unknown number of custom tiers (some with 200+ variants), attempting to localize them without knowing what mods the user has would cause broken tooltips due to missing locale keys. To ensure compatibility, quality names are shown as-is with color coding for readability.
Everything else should be properly localized. Now I have to work on other bugs and requests. Depending on how much work it is, version 1.0 should be out in a couple of days.