A language, derived from English (or English-English, American-English etc. etc. ad nauseam).
This is the de facto language of
international commerce, finance, shipping, aviation, the web, etc.
It has many dialects.
Chinglish, Singlish, Franglais and Spanglish spring to mind.
Acccents include Canadian - which might be boring, Strine, Kiwi, Estuary, Scouse, Cockney and Hindglish.
There is one
recognised speech impediment
- this is known as geordie