There is a proposal for a new Q&A site of Mathematics for Portuguese-speaking users, which form a considerable amount of contributors of this site. I'd really appreciate the support and comments of Lusophone users of Mathematics.SE on this project. Thanks!
The proposal is now closed. I quote Tim Post's explanation below.
We lack the resources needed to get the site off the ground, and guide it through the early (but most critical) stages. We have a Portuguese speaking community manager, and he doesn't have enough hours in his weeks to get everything done that he'd like for Portuguese SO. There is simply not enough bandwidth to give.
Do we want a Portuguese math site, or Super User, or cooking site? Yes, we would love to have these because it would be a major win for us and the Internet in general. I just don't know when we'll be able to support it on our end.
I'm comfortable saying definitely not in the next year, and that's way more time than I'm prepared to ask anyone to wait now that I know how long it's going to take.
Our primary localization strategy surrounds our flagship product, which is Stack Overflow. That has to come first. When that dust settles, which is going to take a while, we can begin exploring the idea of launching other sites.