This should mirror the logic in Qt WebEngine as can see seen on line 235 of https://sources.debian.org/src/qtwebengine-opensource-src/5.15.12%2Bdfsg-2/src/core/web_engine_library_info.cpp/. Debian has recently added .bdic dictionaries and populates the `QTWEBENGINE_DICTIONARIES_PATH` to point to /usr/share/hunspell-bdic. There is more information at https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1020387 and https://salsa.debian.org/qt-kde-team/qt/qtwebengine/-/merge_requests/12.
A possibly relevant merge request was started @ https://invent.kde.org/network/falkon/-/merge_requests/45
Git commit 2b9e94a97dfa8286f143947f3ba2ed9875d699c3 by Juraj Oravec. Committed on 04/02/2023 at 14:55. Pushed by jurajo into branch 'master'. Look for dictionaries at QTWEBENGINE_DICTIONARIES_PATH env var FIXED-IN: 23.04.0 Signed-off-by: Juraj Oravec <jurajoravec@mailo.com> M +11 -6 src/lib/preferences/preferences.cpp https://invent.kde.org/network/falkon/commit/2b9e94a97dfa8286f143947f3ba2ed9875d699c3