Portuguese translation of the UI is almost complete
https://www.transifex.com/nethserver/nethserver/language/pt/
The online help is completely missing
https://github.com/NethServer/nethserver-lang/tree/master/locale/pt
Also the Administrator's manual is not available in your language
https://github.com/NethServer/nethserver-docs/tree/master/administrator-manual
...but I think the Portuguese language team welcomes any help!
https://www.transifex.com/nethserver/teams/35834/pt/
https://www.transifex.com/nethserver/teams/35834/pt_BR/
IMHO, if we want to help Portuguese (and any other language) people who don't know English we should put our efforts in translating the resources above at first!
If you are interested, join @jgjimenezs and the other friends of translations_team.