flatpak install missing hyphenation package

I have LO installed through Flatpak, and it runs fine. But I do have a Multilanguage system, including Arabic language (my usual locale is Portuguese_BR). I’ve got recently a warning from LO Writer that “Arabic hyphenation package” is missing… How can I install this package in particular from Flatpak, and from where?!..
Can I download a version compatible (7.1.1.2) package “libreoffice-l10n-ar.deb” from any repository and use it into my Flatpak install?..