Gratuitous English

Everything About Fiction You Never Wanted to Know.
Inexplicable shirts are a privilege reserved for samurai lords.[1]

Non-English media interjecting English even when it is not always appropriate.

There are a number of reasons for this. Foreign languages in general help spice up a work, and with the fact that English is something of a general trade language, a lot of viewers will have some idea of what's going on, no matter their native language. However, most of the time the writers don't actually speak English (or at least not fluently), resulting in some rather silly phrases, or worse.

Subverted by Surprisingly Good English. Compare Bilingual Dialogue for a more surreal linguistic experience, and Blind Idiot Translation for the really bad version. See also Gratuitous Foreign Language and all its subtropes.

Examples of Gratuitous English are listed on these subpages:
  1. and even Samurai lords love American cars