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 can be successfully synchronized using the Readwise app
  2. If you read on a Kindle device (rather than the app), you can upload a file called My Clippings.txt that's stored on your Kindle.
  3. Change the default language to English by clicking this Amazon link and then sync your Kindle account from this link.