If it helps you can look in the characters' gallery or the cast. Basically Color's family includes: Phillip the dad, Lana the mom, Brandon the oldest, then comes Haley and finally Color :) And the twins are Boran and Juney.
If I use the symbol ~ that means they are signing, so not to be confused with when they are talking, which I use the quotation mark " . That could be helpful when one wants to know who is signing, mostly just Juney and Boran. I'm sorry if the names are a bit weird, but I'll have explanations in the story. :)
I'm glad that you're taking interest in LWD, and I hope my answer satisfies your confusion.