You may have a point, kellyc...
However, I can tell you that Nelly has a huge fanbase specially here in Europe that screams for anything new from her.
I think anything new from her would be great!
Nelly is in that fase of an artist's career that everything she touchs is gold, in a way to say it... lol so even she released a new album right now, people would buy it like "dry land to rain".
She had previously said that she had some songs with Timbaland she decided not to include in "Loose" but for a next album. I bet those songs are in english.
Her portuguese/spanish album... well...
... I don't know about that... She already released a spanish version of "Loose"... I don't think she will do another spanish album soon...
Some songs in Portuguese might be included in her next album (mainly in english) since she already did that in her first two albums "Whoa, Nelly!" and "Folklore".