Isn’t odf the one used by libre office?

I have no idea what to recommend for hardware but for OS I suggest Truenas Scale. It’s pretty easy to setup has a webui and it’s intuitive. As for hardware I say you go with a hba board for disks, a GPU for jellyfin transcoding and immich ai features, as for file sharing I use samba, which is kinda shitty but I didn’t found something easier.

While it’s true that most countries don’t legally require to speak the official language they do it indirectly. University and college exams are in the official language and I’m more then sure they don’t allow interpreters. Although it’s a good idea for them to learn the language so they know what they sign or don’t get scammed this is most likely a surveillance operation or indoctrination, maybe both.