Mentez, a Latin American game publisher with its main presence on Orkut, is announcing today that it raised an undisclosed amount of money from Insight Venture Partners, a New York fund that also has an investment in the Asian social game publisher 6waves.

By Mentez’s own count, the company has 22 million weekly active players with 21 social games on Orkut and seven on Facebook. Notably, it publishes two Playdom games, Bola and Tiki Resort, on Orkut.

Like several other international publishers, Mentez operates its own payments network, called Paymentez, which it says processes 45,000 transactions daily. It focuses on alternative payments, with 100,000 retail locations in Brazil selling its virtual currency.

The company also notes heavy involvement with consumer brands like Walmart and 20th Century Fox, which run campaigns within its games.

Brazil is a growing Facebook market with 5.3 million users, but Orkut still far outweighs it in the country of 191 million people. It’s a viable but relatively untapped market for US-based developers, so it wouldn’t be surprising to see Mentez striking more deals this year.