There is a big difference between language dependence, and observer dependence.
(To distinguish between observer dependency and description dependency: http://www.spoonfedrelativity.com/pa...formations.php
With language dependency love is the same thing whether I say it in Latin or English.
But with observer dependency, my experience of love is certainly a different experience than your experience of love. We don't love the same things; we don't love the same people; we don't even know the same people.
If ANY theory of physics cannot account for observer dependency, it is flawed.