Desktop: Spellcheck only in English

Hello, I have been using the new Collabora Desktop flatpak on Fedora for a while. Is it normal, no matter what language is chosen for the document and the interface, the spellcheck is always only in English? I I click on the language status at the bottom, I am only presented with variants of English.

Inside the flatpak, there are qtwebengine_dictionaries for most languages… the only difference between English and the other languages is that the bdict files for English are placed directly in /app/qtwebengine_dictionaries, while the other files are placed in /app/share/locale/… and linked there. But the links are not broken and permissions are ok, I don’t know what else could be wrong.