Does Shia Islam prohibit saying "Ameen" after reciting al Fatiha?

In Iran, people refrained from saying Ameen after prayer (which I'm accustomed to saying). Chatting with a Shia friend today, he indicated I shouldn't say it, so I did some Googling, and a user of ShiaChat writes: > First of all the word Amen is not an arabic word but a pagan God name and is not found in Quran and hadith. > > Secondly it was a bidah added much later on. I'm not sure how reliable this source is, but this idea that it's forbidden seems to be repeated throughout the ShiaChat. In this question, I want to confirm if Shia Islam indeed prohibits saying "Ameen", a claim also made here . **Question**: Does Shia Islam prohibit saying "Ameen" after reciting al Fatiha?