CAMotics uses Qt's tools for translations.

First update the translation files with:

lupdate qt/*.ui src/camotics/qt/*.cpp -ts languages/*.ts

Then use linguist from the Qt package to edit the .ts files in translations.

Finally, rebuild the software.

Replace <lang> with the two digit language code in the commands below.

Add a new 64x64 pixel flag icon to qt/flags/<lang>.png.

lupdate qt/*.ui src/camotics/qt/*.cpp -ts languages/camotics_<lang>.ts
git add languages/camotics_<lang>.ts qt/flags/<lang>.png