We have courses that contain the same activities in multiple languages. The activities are restricted by language.
We chose to create separate activiteits per language for easier maintainance and overview. Otherwise you would get really bulky SCORM's for instance.
Duplicating the course per language is not practical in our situation. We have thousands of participants from whom we often do not know the preferred language.
It would be really helpful to have an additional multilanguage setting in course completion.
That way you would be able to select all the activities that have to be completed...per language.
I can imagine this will be helpful to other multilingual companies.