bâtir des châteaux en Espagne

== French == === Etymology === Literally, “to build castles in Spain”. (This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.) === Pronunciation === IPA(key): /ba.tiʁ de ʃa.to.z‿ɑ̃ ɛs.paɲ/ ~ /bɑ.tiʁ de ʃɑ.to.z‿ɑ̃ ɛs.paɲ/ === Verb === bâtir des châteaux en Espagne (figuratively) to chase rainbows, to build castles in the air (to make overly ambitious plans) Synonym: tirer des plans sur la comète