Amazon Kindle for PC

What works

Downloading and deleting books
Reading books written in English or Japanese
Adding and deleting collections
Highlighting words
copying and googling words
Adding and deleting notes
Adding and deleteing Flashcards
Downloading and looking up in dictionaries (English, Japanese and French)
Sync
Searching English or Japanese word in a book
Importing PDF
Switching user interface language (English <-> Japanese)

What does not

Registering
Direct input Japanese characters in text search and flashcards

Workarounds

I used the workaround which is pointed out  by Zootal; I installed 1.16.44025 first and register an amazon account, and then I have installed 1.20.47037.

For handling Japanese characters, I executed the following command:
winetricks allfonts,
winetricks fontsmooth-rgb.

What was not tested

Deregistering and Registering
Text-to-speech
Activities involved in languages other than English and Japanese

Hardware tested

Graphics:

• GPU: Intel
• Driver: open source

Additional Comments

I usually installed kindle without winetricks before. At that time, even using the workaround above, left-clicking on words sometimes caused crashes when using version 1.20.Once I installed kindle 1.20 through winetricks and then followed the workaround. From that time, I have never come across such a buggy behavior for left-clicking on words.It is maybe a mere coincidence, but I report this here.