The language Jeff speaks during the "imagine you're Israeli" scene is, in fact, complete gibberish which he made up on the spot.
The role of The Girl required a stunningly beautiful actress who could speak a second language; exactly which language was not made a casting requirement. When Anat Dychtwald (who speaks fluent Hebrew) won the role the character became Israeli.
This episode marks the only time in the show in which the red couch faces a different angle.
Although the word "breast" or "breasts" is said in every episode, only once is a slang term used; this is "bosoms" and is spoken by the Israeli girl (Anat Dychtwald) that Jeff tries to chat up.