Adrian,
"chantage n. [Fr.] blackmail"
existe in mi Webster's New Universal Unabridged Dictionary.
Cerca vostre Oxford Dictionary (complete).
Assi io ha
Fr. chantage
Sp. chantaje
Port. chantagem
Russ. shantazh
Eng. blackmail, chantage
Obviemente, le parola "chantage" in anglese es un parola "estranier" e
possibilemente es usate in novellas detective super detectivos francese.
Stan Mulaik