Is there a simple way to load and set up a translation .csv file from outside?

There is a well-known way to add text translation to a game by transferring it into a project file in the .csv format and placing it in the res:// directory, along with manually adding the language in Project → Project Settings → Localization.

But what if we want to give the option for localization support to correct translations? We need the .csv file to be loaded from the user:// directory.

This raises the question: Are there special commands (a short script) that allow us to quickly add a .csv file to localization, or do we have to write our own special script that will split the .csv into dictionaries itself?