There is no top-down determination by culture, history, or language. The infant comes with the capacity for all existing cultures, and more. Each culture develops dimensions that other cultures leave unexplored. All were possible for the newborn. We can understand individuals in another culture when they are willing to interact and speak from their experiencing, rather than dealing with us through the cultural group-forms which we do not grasp.
Crossing makes for a more intricate understanding of one's own culture as well as the other.
The cross-cultural experience also opens an avenue for rethinking how we understand anything as a kind of crossing that is always ready for more crossing. If we look at texts for what we now need and can use, there is a lot in phenomenology and pragmatism that can come after postmodernism. Before postmodernism the philosophy texts were read with an effort to see a coherent system in them. With postmodernism one deconstructs the texts in terms of those readings. Something exciting happens when one looks at these texts not for a closed system, but to see how these philosophers dealt with the ever-open edge.