BIG TALK

Greek 

μεγαλοστομία (big mouth, boasting, bombast), φούμαρα (hot air). (various references)

Japanese Kanji 

駄法螺 (tall tale), 大風呂敷 (blowing one's own trumpet, large furoshiki, rodomontade, vain boasting or bluster), 大言壮語 (boasting, bragging). (various references)

Japanese Katakana 

たいげんそうご (boasting, bragging), おおぶろしき (blowing one's own trumpet, large furoshiki, rodomontade, vain boasting or bluster), だぼら (tall tale). (various references)

Pig Latin

igbay alktay.(various references)

Russian 

хвастовство (blague, braggery). (various references)

Spanish

fanfarronadas (bragging). (various references)

Turkish

büyük konuşma, yüksekten atma (blow, bluster, bounce, brag, flatulence, pretension, tub-thumping), övünme (blow, boast, boasting, bounce, brag, bragging, egotism, gas, rodomontade, self praise, vaunt). (various references)