The nice thing about looking for OER in other languages is that you realize how extensive the diaspora of certain languages – usually the result of colonialism and subsequent language policies – actually is.  This Geometry module in Portuguese actually comes from the African Virtual University, which incidentally houses OER in English, French and Portuguese.  The module is available as pdf and doc versions, the latter making it easier to run through a Google translator and for remixing or adapting.  The module is for 120 hours of study at an undergrad level.  The module seems to contain what we would consider ancillary resources in the form of exercises, which is a useful resource in itself.