Flemish dialect vs Flemish language

Flemish dialect and Flemish language both are nouns.

Word	Noun	Adjective	Verb	Adverb
Flemish dialect	Yes	No	No	No
Flemish language	Yes	No	No	No

As nouns, Flemish dialect and Flemish language are synonyms defined as:

Flemish dialect and Flemish language: one of two official languages of Belgium; closely related to Dutch

Other synonyms of Flemish dialect include Flemish.

Flemish dialect (noun)	Flemish language (noun)
one of two official languages of Belgium; closely related to Dutch	one of two official languages of Belgium; closely related to Dutch