base-store | persisting config values with your base-methods application | Caching library

I have a react app (a sort of twitter clone) that uses firestore for storing posts and comments on posts. Each post is rendered as an element from an array using array.map(). Each post has a comment button that opens a form to take in a comment and add it to the post. When I enter a comment and submit it, the topmost post is always the one commented on no matter which post contained the comment button that was clicked(docId for the most recently saved firestore document is always submitted by the comment button instead of the docId corresponding to that instance of the component).

The map of the posts (called "howls"):

I have a Spring-boot application that uses JPA and Hibernate. You can find the whole code on this GitHub repository.

My question is how can I add internationalization functionality to a specific column without any foreign keys and by using JSON structure?

For example I would like to define a JPA entity like this:

Objective/goal:

My goal is to set up a few databases for some research projects that my workgroup is doing. The databases would only be used for my small workgroup (4 people) and network servers are not possible (i.e., Localhost only). Only one person would need access to the database at a time.

Question:

How do I share/use a MySQL database between 2-4 localhost computers with no network using a flash drive? Is this possible and is there any downside? Is there a better non-network solution? Are there any additional concerns programmatically?

My potential solution:

The plan is to run my Mysql data folder off a flash drive and just plug it into whichever computer needs to use the databases. I don't want to do the following Copying MySQL Database to another machine, as I want one set of databases shared and not multiple copies. My plan was to move my data directory to the USB flash drive based on these posts Where does the MySQL database store its data? and How can I move a MySQL database to another drive?. Everyone else would also set their data directory for there pc/localhost to the folder on the flash drive and whoever is working with the database would just plug the flash drive into their PC.