ftpd VS LumaLocaleSwitcher

you can interact with your SD card without taking it out using FTPD

Run sys-ftpd or ftpd and access your files from a computer using an FTP client

Use FTPD for quick file transfers to the 3DS over wifi without the need of removing the SD card. Available in the Universal Updater app.

FTPD: https://github.com/mtheall/ftpd/releases

I don’t have what you’re looking for but I have a solution for your screwdriver problem. Here is a video explaining how it works.

I have ftpd on my 3ds and I use FTPCafe FTP Client on my Android phone, then i download DS roms on my phone, after this I share internet (hotspot) to my 3DS, start ftpd on it, then put the IP that it says on the phone.

Note that this does not change languages in games, you can simply download a game from a region where the language is available and use luma locale switcher. https://github.com/Possum/LumaLocaleSwitcher

You can change regions by using luma locale switcher There's a frontend here, but i don't know for sure it works right: https://github.com/Possum/LumaLocaleSwitcher

Try Luma Locale Switcher first, if that doesnt fix your issue we go from there

Or you can use luma locale switcher if you dont want to go thru the process of changing reigons (Link:https://github.com/Possum/LumaLocaleSwitcher/releases)

Another thing could that you are running games from other regions, some games don't like being played in other regions and crash, this can be fixed with LumaLocaleSwitcher