In the end everything was fine with the example above.
I just had to update and release my translation files, because in the meantime I changed the name of a .qml file, and the filename is directly linked into the .ts files created by linguist and used by Qt.
I feel a bit ashamed but yes, it was really trivial and kinda stupid :)

You're welcome !

Good to know :)

Since we know now that it's working, please update the thread title prepending [solved] so other forum users may know a solution has been found :)

@SGaist OK. Thanks for the answer. I'll give a try.

@SGaist Fixed it ;)