18
23 languages: C, C++, Cubically, rk, what, Bash, Morse, Ook!, str, Charcoal, Commercial, S.I.L.O.S, memescript, Forked, TRANSCRIPT, Braingolf, Fission, Arcyou, Beam, Beatnik, Cood, COW, Befunge-98
Over 1000 bytes >.< but I'm gonna go for the most languages.
Hit Page Down about 8 times if you do...