auxiliary language

18 LETTERS · STARTS WITH A

auxiliary language is a valid 18-letter word worth 29 points in Scrabble and 35 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

A1U1X8I1L1I1A1R1Y4L1A1N1G2U1A1G2E1

1 + 1 + 8 + 1 + 1 + 1 + 1 + 1 + 4 + 0 + 1 + 1 + 1 + 2 + 1 + 1 + 2 + 1 =29 PTS

DOUBLE WORD → 58TRIPLE WORD → 87

MEANING

What does auxiliary language mean?