FileDialog of QtQuick.Dialogs has qsTR("Filter"), but setting Qt.uiLanguage no effect.

indeed, the FileDialog provided setting for label of ok/cancel button, so I think we'd better keep consistent with other labels in FileDialog.

and if we provide setting the delegate of file would be great.

the folderbreadcrumbbar in not located in the qt doc, maybe it is not intended to be used directly by user?

under ArchLinux/KDE:
export XDG_CURRENT_DESKTOP=gnome
qml6 a.qml

button list on left is responsible to set Qt.uiLanguage.
and the 'open' button can open FileDialog.
the FileDialog will display same content, which has nothing to do with Qt.uiLanguage