Translation is not just a simple replica of a text from one language to another: whilst that’s true of any translation, it applies even more on the web. A good translator will render the meaning of a sentence, which means that he also takes the context into account. A tool like Google Translate can translate a single word, but not the meaning of a complex sentence.
Apart from putting the words in the right order, the sentence must also flow smoothly in the target language. The style makes it possible to catch the attention of the reader. A series of mangled sentences is in no way a translation. In short, translation is a rewrite.