After you have finished creating the network sites and you need to translate the strings in your different sites , so you will start using poedit program by downloading and installing it on your laptop from here : www.poedit.net/download
the next step is going using FTP to your site directory and go to CircleFlip >> lang then download CircleFlip.pot and start using it on Poedit .
Start Translating your website strings by choosing a string as shown in the photo and write the translation of it and then after you have finished save the changes and you are done with Poedit .
After saving the changes you will find two files one is .mo and another with .po
Move both of these files to the same folder (CircleFlip >> lang)