beso is right. English is a very streamlined language. Its grammar isn't particularly complex, though its spelling is a nightmare. But it's actually quite easy to make yourself understood: if you speak bad English, other people will generally know what you're trying to say. If you speak bad French, French people won't know what you're talking about (or they will know but pretend not to.) If you write bad English - well, people do it on AB all the time but it's still not hard to work out what they mean.
Remember the language actually came to us from German invaders in the first place, though it's moved on a bit since. But it's still fairly Germanic in structure, though a lot of its vocabulary is Norman French that arrived with William the Conqueror, and a lot more has come from pretty well everywhere in the days of the British Empire. It's a very flexible, adaptable tongue.