The clock module wasn’t translatable in 1.7.1 or before - we are releasing an update this week (we hope!) which will contain a translation mechanism for the clock.
The scheduling calendar should be translatable - but I think the file is named incorrectly - perhaps you could try to rename it and see if that works?
theme/default/libraries/calendar/js/language/fr_FR.js
rename to
theme/default/libraries/calendar/js/language/fr.js