Friendly and Friendly-traceback are now partially available in Spanish thanks to the work of Mrtín René (https://github.com/martinvilu).
You can have a look at the Spanish translations in context for SyntaxErrors and for other exceptions.
If you are interested in contributing to translations, please join this discussion and have a look at this online collaborative site.
Update: Someone just volunteered to help with the Italian translation. Note that there are more than 600 pieces of text to translate and that more volunteers can help!