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