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