How do I decode the dots in the alien ship

Hint 1 of 8:

Have you read the diary in the Science Module?

Hint 2 of 8:

It talks about nonvisual communication.

Hint 3 of 8:

And have you examined the alien with a giant tongue case?

Hint 4 of 8:

And have you read the mayor's textbook?

Hint 5 of 8:

It mentions different tastes when talking about the dots.