Thank you very much for your lovely comment! I did enjoy writing it a lot, and it's very gratifying to see that the Muriel/Griphook pairing met some acceptance among the readers ;-)
I feel that the cultural identities are very... fixed in the Potterverse. No-one really crosses the line and tries to understand the Other; even Muggle-borns seem to give up their Muggleness as soon as they enter the wizarding world. And this is something that I love exploring in fics, because I can make the characters as prejudiced, bigoted and bemused by foreign cultures as I want - which is actually very enjoyable and liberating.