The Kathlamet people are a tribe of Native American people with a historic homeland along the Columbia River in what is today southwestern Washington state. The Kathlamet people originally spoke the Kathlamet language, a dialect of the Chinookan language. They were also called "Guasámas, or Guithlamethl, by the Clackamas", and "Kwillu'chini, by the Chinook."
The language of the Kathlamet people is a dialect of the Native American tribe that refers to them as the Kwillu'chini.
It is correct because the language of the Kathlamet people is a dialect of the Chinook and the Chinook refer to them as Kwillu'chini.
( z1 dialect :mod ( z2 tribe :name ( z3 name :op "Native" :op "American" ) ) :ARG0-of ( z4 refer :ARG1 ( z5 people :mod ( z6 ethnic-group :name ( z7 name :op "Kathlamet" ) ) ) :ARG2 ( z8 language :name ( z9 name :op "Kwillu'chini" ) ) ) :domain ( z10 language :poss z5 ) )