Qt Linguist

For every new project:

• In Lisp, wrap the strings you want to translate in the tr macro (as you would do in Qt), optionally passing a context and/or a plural indicator (see Qt Assistant). Both string and context can be Lisp forms evaluating to constant strings.
• Adapt the my_app/eql-lupdate file, adding your Qt Designer *.ui files (if any), and listing the respective *.ts files for all languages you want to support.
• Adapt the my_app/eql-lrelease file, simply listing all *.ts files (see above).

For every new release (in order to create the *.qm files):

• In my_app/, run eql make.lisp (compiling all files). This will find all source strings to translate and save them in the file tr.h (only a dummy needed for the Qt lupdate function). This is done using a compiler macro, see my_app/tr.lisp.
• Run the my_app/eql-lupdate script; this will create/update the single *.ts files for every language.
• Use Qt Linguist on the *.ts files (as usual).
• Run the my_app/eql-lrelease script.

Note: you may need to copy the respective qt_*.qm files (see translations/ in the Qt sources), in order to load the translated texts used by Qt itself.

See my_app/main.cpp for an example how to load your translation files.