Theme Translation

Hi. I want to translate my theme to Portuguese and french, so I open the po file using poedit, but to translate everything is only this 531 strings? Then I see strings with codes I should translate everything, except codes, right? But then I see strings like this "WordPress Plugins, Themes\n
\t\t\t\tand Support" what should I translate? Other string I guess I should live the same: "Y" or "in %1$s"? If you have a better suggestion of program to translate it I appreciate, I'm kind of lost how to save and validate this translation. Thank you very much