Comment 35 for bug 997934

I certainly don't know either, but a typical complaint from users is that they've selected a language from a pre-existing list in LibreOffice that doesn't actually have the given dictionary installed (because the item doesn't have a tick symbol beside it, or what-have-you). Reporting that a list item previously selected/assigned has no actual dictionary installed doesn't seem difficult in theory. (But there is so often a gulf between theory and practice!)