English : the unknown

Catalan	la incògnita
Czech	neznámý
German	die Unbekannte
Greek	Ο άγνωστος
Spanish	lo desconocido
French	l'inconnu
Italian	l'incognita
Dutch	de onbekende
Polish	niewiadoma
Portuguese	a incógnita
Romanian	necunoscut
Russian	неизвестная величина
Swedish	obekant
Turkish	bilinmeyen