secret language

15 LETTERS · STARTS WITH S

secret language is a valid 15-letter word worth 18 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1E1C3R1E1T1L1A1N1G2U1A1G2E1

1 + 1 + 3 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 2 + 1 + 1 + 2 + 1 =18 PTS

DOUBLE WORD → 36TRIPLE WORD → 54

MEANING

What does secret language mean?