The article discusses the multilingual correspondence of the Prague Linguistic Circle in connection with the typology of scholarly associations, on the one hand, and “cultural polyglottism” of the Prague School, on the other. The author provides addenda to the academic edition Pražská škola v korespondenci: Dopisy z let 1924–1989 (Prague: Karolinum, 2014). Special attention is paid to Roman Jakobson’s Czechoslovak years.