For translating, you need to have git and the Qt Linguist tool How to install and use git Download Qt Linguist

To add a new language you need to use the ISO 639-1 code as the file name, for example Portuguese (ISO 639-1 code "pt")

Copy the en.ts and rename it to pt.ts

cp en.ts pt.ts

Open the file with Qt Linguist to edit them

linguist pt.ts

When you've finished create a pull request.