Pretty much all theology arises from an Interfaith context these days. In a multicultural city like Melbourne, it's pretty hard to ignore but even in countries where one faith system dominates it is necessary to take a global perspective and recognise that our own particular religious views are not the only ones.
Some immediately take an oppositional view of this situation and declare that their religion is the only true religion - and therefore that all others are misguided. Some people choose to ignore the situation because it's too difficult and they haven't been given any kind of framework with which to begin to sort through the inherent problems. A more recent movement recognises all faiths as valid and tries to blend them together in ways that don't offend anyone. Personally, I find this tends to result in a rather insipid blend that is kind of brown and tasteless.
I think it is necessary to begin by recognising that all attempts to define the divine are inherently flawed. The full reality of God is ultimately beyond what any human words can capture - regardless of language, culture or religion. However, I would also affirm that this is still an important task and can bear positive results, even if they are fragmentary and imperfect.
We cannot help but perceive God through culturally conditioned lenses. Even our native languages confine the ways in which we are able to understand and articulate the divine. Interfaith dialogue can enrich our understandings of where commonalities exist between the multitude of world religions without having to ignore or erase the distinctives that each bears. It may be that we are able to receive new truths about God from other faith traditions - perhaps even ones that open up new understandings of our own tradition.