adam0102
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I know you weren't being racist, it's just that language is so important when discussing this very sensitive issue. I'm pretty sure that mixed heritage or maybe dual heritage are both acceptable but don't quote me on that !
It's an interesting point, David. I have to say, I hadn't picked up that mongrel was particularly offensive but I see that is within the definition in several dictionaries.
Other alternatives include hybrid, but that sounds like a plant or a car. Polyethnic sounds quite good to me?