I discovered today that in Romanian a bookworm (a keen reader) is un şoarece de bibliotecă (a library mouse), which I rather like, being a bit of a bookworm / library mouse myself.
In French there is a simliar term for a bookworm – rat de bibliothèque (library rat), and in German voracious reader or bookworm is known as a Leseratte (reading rat), and in Spanish the equivalent is ratón de biblioteca (library mouse).
Are there interesting words for bookworm in other languages?
In Swedish it’s a “läslus” (a reading louse).
In American English, one who frequents the gym is a gym rat.
In Hungarian it’s “könyvmoly” which is “bookmoth”.
Brazilian Portuguse: Rato de biblioteca