This is my reasoning, too. I keep my keyboard QWERTZ + German Umlaute, but almost everything else is set to English. Pretty much the only exception are videogames and movies that have a superior German version to them (like Kingdom Come Deliverance)

Samesies!

One very important word of caution (unfortunately coming from experience): Syncthing, as the name suggests, makes it so the content of one device is the same as that of another device. So, even if you have one device set to only receive data, it means that if you delete a file from the sending device, the receiving device will also delete that file to stay in sync with the sending device.

There is a way to use Syncthing as a simple backup storage program (not necessarily the best solution but much better than manually backing up your files every few months and just hoping for the best). But it means that you have to use the advanced folder option “ignoreDelete”. I also use the file versioning system, so even if something is automatically deleted by mistake, it’s still versioned in a special subfolder and accessible to me.

I really can’t speak on the security or data privacy of it, since I’m not knowledgeable enough in these topics, but I pay 1€ per month for Port87. I just love the ability to easily create sub-adresses and never have to worry about my “main adresses” receiving the spam I get for e.g. online shopping