There is no action in the US for plagiarism. The nearest useful civil claims are copyright infringement, fraud, and misappropriation, depending on the facts involved in the plagiarism.
It is possible to seek profits obtained by the wrongful act and/or actual damages you suffered and can prove (not easy in these types of situations). Residency/citizenship outside the US should not impact your ability to seek damages, although there may be some countries with whom the US does not have complete legal reciprocity. You may wish to seek representation from counsel in the same state as one of your plagiarists or the HQ of the plagiarizing journal to minimize jurisdictional hassle.
Good luck,
Todd
Answered on Sep 17th, 2014 at 9:05 AM