Kent Silverhill says:
April 12, 2019 at 1:36 am
An important point to note is that you have to create and update your Author Central page on every country’s Amazon store where you sell, or want to sell, books. For example, if you create or update your Author Central page on the .COM store it does not transfer automatically to the .UK store. You have to maintain your Author Central page separately for each country.
That's not true.
Once you do a .com AC, your UK one mirrors it, and has no options for customizing. You can change the Bio, but you cant change anything else. As far as other stores are concerned, I dont see the point in doing specific language bios, unless you also have your books available in those languages. If you did, it would give the expectation your books are in the same language.