Explanation for all beings to be able to speak English?
In Guardians of the Galaxy, it appears that nearly every being in the universe is capable of speaking English. While I understand that many people prefer English over made-up languages with subtitles, I feel like there should be some explanation (e.g. Babel fish in the Hitchhiker's Guide). Is there reasoning beyond that's-how-the-comics-did-it?
There are only a few instances that I can come up with where beings spoke anything other than English (e.g. Groot, Nebula shouting orders to the Sakaaran soldiers).
Best Answer
As Oliver_C mentioned, it's the translator chip in Peter Quill's neck. It can be thought that others have it too.
From the following image we can see about the translator chip.
So as we saw the film from Quill's point of view, it allows us to understand everything in English as Quill would have understand everything he hears.
Also the anomaly about some portions where Alien languages(e.g. Groot's) were heard can be explained with this. That translator chip simply doesn't support those languages or sentences etc.
Here is a interesting discussion how Rocket understood Groot. Guardians of the Galaxy - the universal translator which everybody has does not know Groot's language. Rocket's translator does.
Rocket might have changed his translator's technology to understand Groot.
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Speaking English - Expressing ability with CAN, COULD, BE ABLE TO
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