In addition to English , Callen is fluent in at least six other languages : Spanish , Polish , Russian , German ( which is claimed to be Austrian ) , Italian ( with a Northern accent ) , and French . Callen also claims to speak Czech and Romanian ; furthermore , his Russian is arguably good enough to be taken for one , but not the other , Chechen dialect . That fluency allowed Callen to infiltrate a Chechen terrorist cell in season four episode " The Chosen One " which eerily presaged the Boston Marathon bombing by Chechen immigrants less than three months later . The fake death certificate shown by Hetty to Alexa Comescu in the season-two finale states that his date of birth is March 11 , 1970 . In the Season 1 episode " Search and Destroy " ( S1 : E4 ) , Callen is shown easily reading Arabic , with enough fluency to translate on the fly into idiomatic English
Boston Marathon bombing
Boston Marathon bombing
G. Callen