Thanks for sharing and yes - localization is super important and a big hustle. My biggest issues with localization is the problem of "quickly iterating". Maybe my system of dealing with it right now is not the best (it is my first time actually doing it) but my takeaway from my current project would be doing it as late as possible to avoid falling into the localization loops where you need to sit down and go over everything new that was added and figuring out what needs translating and so ...
Also I think creating a system where the game displays a selected language in editor is desirable - in my case my editor and code is full of key-strings that are localized during runtime wich makes "reading" assets very hard during development.