Good point. I think it would depend on how useful the word is in describing the world. If your culture has very different norms between “boyfriend/girlfriend” and fiancé then a replacement for fiancé would likely appear.
I suppose that on one extreme you would have words that are fundamental to human life or psychology e.g. water, body, food, cold. These I’m sure would reappear if banned. Then on the other extreme you have words associated with somewhat arbitrary cultural behaviour e.g. thanksgiving, tinsel, Twitter, hatchback. These words may not come back if the thing they are describing is also banned.
Uncle/father is an interesting one. Those different meanings could be described with compound words. Father could be “direct makuakane” and uncle “brother makuakane”, or something like that. We already use compound words in family relations in English like “grandfather” whereas Spanish it is “abuelo”.
With neuropreservation you might also lose the sense of embodiment, of being in a body and the body being a part of you. That could be extremely traumatic to the point where you wouldn’t want to come back without your body. It is unclear whether that could be successfully countered using a “grown” body or a sophisticated simulation if you are being uploaded.