Aesopian language
Greek
argot
babble
bedlam
cacophony
cant
cipher
clamor
clash
code
confusion of tongues
cryptogram
double Dutch
garble
gibberish
gift of tongues
glossolalia
gobbledygook
harshness
hell
jangle
jar
jargon
jumble
mere noise
noise
pandemonium
racket
scramble
secret language
slang
static
Schnabel
Scrabble
dabble
drabble
psychobabble
rabble
rabel
scrabble