http://www.factcheck.org/2016/05/putin-did-not-call-trump-a-genius/
Trump is basing his claim on comments Putin made during a press scrum in December, when Putin was asked what he thought about Trump.
According to a translation by Russia Insider, which uploaded the video, Putin responded,
Hes a very colorful person. Talented, without any doubt. But its not our affair to determine his worthiness thats up to the United States voters. But he is absolutely the leader in the presidential race. He wants to move to a different level of relations, to more solid, deeper relations with Russia. And how can Russia not welcome that we welcome that. As for his internal political issues and the turn of speech which he uses to raise his popularity, I repeat, its not our affair to evaluate them.
Its the word colorful in the first sentence of that translation that is at issue here.
The Washington Posts Kessler found various media outlets provided slightly different translations of it. Some said Putin called Trump colorful, others lively or flamboyant. One outlet, the Hill, translated Putins praise of Trump as really brilliant.
The Guardian newspaper initially wrote that Putin called Trump bright, but then revised its item with this explanation: An earlier version quoted Putin as saying bright and talented. To clarify:
The word he used was yarkii (яркий
, which can mean bright or brilliant, but not in the sense of intelligent; it can also be translated as colorful, vivid or flamboyant.