You can't cut and paste someone's article, even if you did include the author's name and a link to their site. That's still stealing. Under copyright laws, you may only copy a small amount of an article or written work (say a couple of paragraphs) as "fair use". And you still need to make sure you credit what you quote with the author's name.
If you want to use an entire article you HAVE to obtain permission and give credit.
If someone went around copying my articles without asking I'd be getting my lawyers in.
As for translation, I think copyright laws allow you to claim copyright for the translation but not the original article, and again, you need to attribute your source. Again, best to ask permission before you head down that path.
Information on copyright is here
http://www.copyright.org.au This is an Australian site but I think copyright laws are similar worldwide.