Vowel/consonant shifts aren't simple *within* language families (or indeed within individual languages).If they went this way, you could probably handle all the edge cases by figuring out a simple Vowell / consonant shift list.
E.g. "If Tibet conquers Iberia, the sino-Tibetan culture in Iberia takes the Tibetan name list and replaces all the ch's with g's"
Is Gogden a gibberish made up name? Yes. Are some of these names going to be worse, and distractingly ugly for some people? Yes. Is it going to be worse than the border gore that got us here? Probably not.
That's not even to mention that in some languages the same letter group doesn't always have the same sound anyway.
"Bough" and "cough" for example. Or indeed "bow" (the action of bending at the waist) and "bow" (a knot tied in a ribbon).
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