You can make a copy of this app if you want…
I built that more than a year ago, so it’s quite outdated. But I have used a similar technique in a few apps. It is quite row intensive, so that’s a downside. But the upside is that it allows dynamic language switching with no delays. Anyway, it might give you a few ideas.
These days, when I need to support multiple languages with an app, I generally just use the Google Cloud translate service with an Experimental Code column.