I’m using Poedit to make the translations.
You can download it from their official website http://www.poedit.net/.
Well, lets start!
Locate your .po file of your theme folder.
I had to make some changes on it, with a text editor – I used coda -.
I had to change the “X-Poedit-SearchPath-0” to my correct path one or poedit crashed.
Make the translations!
You can hit Validate and Update but only when you close Poeditor the .mo file is updated!
I’v uploaded the new file to my theme_name/languages/ folder under pt_PT.po and pt_PT.mo.
This way I was seeing the translated items in the Admin board etc.