Claim: French is the official language of Monaco, but other languages include Monégasque, a dialect of Ligurian.
Evidence: Monégasque (Ligurian: munegàscu, Italian: monegasco, French: monégasque) is the dialect of Genoese spoken in Monaco, where it is considered a national language, even though it is not the official language of the country (Monaco's official language is French).