Arch

Basic Setup
Missing japanese / non ascii characters:
yay -S noto-fonts-cjk noto-fonts-emoji noto-fonts
nextcloud-client
To get nextcloud-client working with the keychain you need to install following packages:
libgnome-keyring
qtkeychain
gnome-keyring
Otherwise nextcloud-client will ask every login for credentials.
Splash Screen
Using plymouth & plymouth-encrypt
Src: Archwiki