asp.net mvc - Storing user language as Claims -

in asp.net mvc app i'm developing thought store user language claim don't have access database or deal session. there drawback this?

if user language can not changed user through application, don't see major drawbacks here. opposite if user can modify it's language in application have refresh authentication token - , should consider.

another drawback is, more claims add token, bigger in case negligible.

by way, why against sessions(i think using here isn't bad...)?