If true, the external tools will use the desktop-global standard font if it's monospace (and the most similar font it can come up with otherwise).
Mas e "true" a th' ann, cleachdaidh innealan taobh a-muigh cruth-clò stannardach coitcheann an deasg mas e monospace a th' ann (is mur eil, an cruth-clò as coltaiche ris).