Quoting Crocodile from here:

Misha, you might be surprised, but there was a lot of hype in the media that the opposition to Ahmadinejad in the last election was all sponsored and directed by the US and Europe. Below are just some of the points which were put forward:

1. Many of the placards were in English. Why not in Farsi? Allegedly, to show the 'work' to their masters/sponsors in the US.

2. The opposition demanding not to accept the legitimate election results was directed by the US to ultimately put a puppet government similar to Orange Revolution in Ukraine. Allegedly, the pro-US government would allow the US to loot Iranian treasures.

So, Misha, who were you working for?
Good question, Crocodile! Here's a little inside information for you. First, the two points mentioned above:

Why English placards? The ones that I had were all in Persian, but people did in fact ask me to translate a few slogans. The first thing that any sane person understands from it is that the protesters wanted the world to see them. They could just as well write their slogans in Mandarin Chinese, but fewer people would be able to read them in that case.

If it was all "for the masters to see the work", wouldn't it sound a bit dumb? Like: "Everybody look here: I got an English placard, because my sponsors want it so!"

Second, the opposition demanded not to accept the legitimate election results. The what? Legitimate? Well I tell you. The validity of the results were never proved. The opposition leaders (Mousavi and Karoubi) were simply asked to admit their defeat to the public, which they didn't.

Consider this situation: you have a president. The next presidential election is to be held by members of his own cabinet, namely the Ministry of Interior and such. This whole script is under supervision of an appointed group called "The Guardian Council", whose members have openly expressed their support for the president. Now, I don't know what you think, but I think it's a bit suspicious.

The Orange Revolution, the Velvet Revolution, these terms were heard more often than anything else in those days. Schoolboys accused their teachers of such things [after they went back to school, of course]. Rappers made fun of it. It was all too stupid to be taken seriously. As for me, it only made me take out my copies of "Animal Farm" and "Darkness at Noon". The opposition is directed by America, because they've got English placards! Can't these guys think of anything new?

Wikipedia; 2009-2010 Iranian election protests