How To Use Google Traslator?

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I want to translate some article in dutch, japanese, ect to English. I never do it before, so I need to know how to translate it by google translator (or other), how much time it takes and please tell me step by step to do it. If you have done it before, how was the accuracy between the original one and the translated one? I ever seen my friend translate one article in Bahasa Indonesia to English but the structure is different and sometimes the meaning is confusing. Thanks for your help! Have a nice day!