This is a follow-up to Simos post on how to install LibreOffice but using Flatpak instead of Snap. If you haven’t have the flatpak system installed yet you must install it first from Alex Larsson’s PPA

sudo add-apt-repository ppa:alexlarsson/flatpakrepo
sudo apt update 
sudo apt install flatpak

As per the instructions you can then add the GNOME runtime repository

flatpak remote-add --if-not-exists gnome https://sdk.gnome.org/gnome.flatpakrepo

download the Flatpak

wget http://download.documentfoundation.org/libreoffice/flatpak/latest/LibreOffice.flatpak

and install it

flatpak install --bundle LibreOffice.flatpak

That’s it. Localized and runnable straight from whatever launcher you are using: