The Language Status button does nothing when clicked

I’m using Libreoffice
I’ve just added the “Language Status” button to my formatting toolbar and rather than display the language of a selected bit of text, or allow me to change the language of a selected bit of text, it does nothing.
Anybody got an idea what might be broken / what I may be doing wrong?

This is what the description of what the button should be doing says:
“Displays the language for the selected text. Click to open a menu where you can choose another language for the selected text or for the current paragraph. Choose None to exclude the text from spellchecking and hyphenation. Choose Reset to Default Language to re-apply the default language for the selection or the paragraph. Choose More to open a dialog with more options.”