If the film uses a language other than English, then it immediately alienates the majority of the English-speaking audience. The majority of the world is pretty used to watching dubbed/subbed films but the fact English is the first language of such a wide range of countries and that the USA has traditionally had a greater proportional output of cinema, mean English-speaking audiences aren't used to going to see a movie and having to read subtitles or listen to a dub track.
When the film already uses English, but Hollywood still remakes it it's just a combination of laziness (90% of current movies for the past few years seem to be remakes and adaptations or gratuitous sequels and spinoffs) and the fact they can bank on a proven concept, "Americanize" it and appeal to a wider audience than the original.
The Hunger Game films bother me in particular. An adaptation of a book, which in turn was a plagiarism of a movie, which was itself an adaptation of a book. Really they took Battle Royale, added a dollop of Shirley Jackson's "The Lottery", a hint of pseudo-feminism then stripped out the subtext and symbolism and instead replaced it with a shallow, heavy-handed token attempt at social commentary.
