The new client is fully localized in Brazilian Portuguese, with Blizzard changing names, places, items, monsters, and everything in between. The monthly cost associated with playing WoW in Brazil looks like it will cost 15 Brazilian Real, or about $9.67 a month, with cheaper plans for purchasing more months in advance. This probably does not take into account the taxes that are usually levied against entertainment products in Brazil.
With the localization comes an official Brazilian Portuguese WoW community site and Portuguese customer support. A free language pack for players currently subscribed to the North American servers will be available in Portuguese as well.
Congratulations to all of the Brazilian WoW players out there who get to experience the game in their native Brazilian Portuguese. As more information comes out about the launch and the language packs, we will be sure to let you know all of the details. Until then, check out Blizzard's WoW Brazil page for more information.