The implicit and explicit culture implementations are done in one place only and are shared across cultures. So you don't need to verify that for every single culture. If it works for two cultures it will be good for all. So I still think this doesn't belong to this class and we shouldn't disrupt/change the tests that were written for verifying the localisations. We are verifying something completely different here, and that's what I don't like.

Please roll back the changes made to this class, and create a few separate explicit tests to verify the implicit vs explicit cultures. Thanks.