Forum OpenACS Q&A: Cities, States and Countries DB
Google has a project called Open World Database
which is presented on english and spanish versions.
I'm looking for a portuguese translation of this project or other potuguese sources about cities, states, region and countries.
Does anyone have knowledge where I could find that?
Not sure this is exactly what you're looking for -
but a quick search revealed this project: https://github.com/geraldb/world.db
It has a few portuguese cities.
It also lists several alternative projects at the bottom of the project page.