Since https://git.libreoffice.org/core/+/94d6fa11d086187b82adf9aa596e0f334827e095, Tools->Language->For All Text->More... (e.g., in Writer) opens Options dialog on a wrong - default - page (LibreOffice->User Data), not on Language Settings->Languages where it should.
Caolán McNamara committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/commit/42294bdf528934095d5314fe334324e708e9543c Resolves: tdf#128132 language page not opened It will be available in 6.4.0. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.