How do I import Kindle highlights from an international Amazon domain?

The Readwise extension is designed to work with Kindle highlights synced to the cloud at read.amazon.com/notebook. Sometimes, international Kindle users will find their highlights stored on a domain other than the read.amazon.com. Many of these international domains will work fine with the Readwise extension as-is. Some will fail (such amazon.co.jp and amazon.cn).
It's on our roadmap to add more robust international support, but in the meantime, there are a few workarounds, if you hit a snag:
  1. Many of the international Amazon domains have been synchronizing using the Readwise app
  2. If you read on a Kindle device, you can upload to Readwise a file called My Clippings.txt stored on your Kindle. Instructions are here: My Clippings.
  3. Change the default language to English from Amazon link and then sync your Kindle account from this link.