Linguists, including Valencian scholars, deal with Catalan and Valencian as the same language. The official regulating body of the language of the Valencian Community, the <answer>Valencian Academy of Language</answer> (Acadèmia Valenciana de la Llengua, AVL) declares the linguistic unity between Valencian and Catalan varieties.
Who says that there is linguistic unity between Catalan and Valencian?
Valencian Academy of Language