I see that in other places too. I fear it reduces the films to the level of camp. Do the directors not think it matters? Do they not have easy access to fluent speakers of English?
It takes more than a fluent speaker to write good literature. And that's the rub - you need someone who is themselves capable of writing good literature, regardless of whether it's original or a translation of an existing work.
The errors I'm talking about could be fixed by any fluent speaker.
I have seen this more in art house movies and frankly cant understand why it is not a larger issue. I once offered this service to a director I liked, only for him to refuse it. His final subtitles were atrocious.