Today it goes without saying that cluttering is a stand alone speech-language disorder that is different from stuttering in numerous ways. International researchers agree on the importance of differential diagnostics, and since cluttering was accepted into the classification of the World Health Organization (WHO), even more cluttering research has been carried out globally.
That research also addresses the language component in cluttering. Some researchers feel this should be included in the cluttering definition, others don’t. It then boils down to what we exactly mean by ‘language’: are we defining that as (the executional function of) language planning or the more executive function of language organization? At least all researchers agree that problems in language planning or language organization regularly occur in people who clutter.