Britianese

A slang word for the language that the people of Britain speak.
Derived from the words Japanese and Chinese among other language names.

"Kira speaks Britianese"
"Kira is from Britain so she naturally speaks Britianese."

britianese

a language spoken by the people of Britain.

"Kira speaks britianese"
"Kira is from Britain so she naturally speaks britianese.