[jingai]

1) Is there not a way to leave Alexa activated for kodi the time we want it and pronounced a sentence to close the interaction with Alexa? I know this exists in the Jarvis project (https://www.openjarvis.com/plugins/kodi). Does Amazon systematically impose a timeout or can we override and set no timeout?

Amazon sets the timeout.

2) In fact when I ask Alexa to show the movies it opens my movie list in Kodi's file manager but not on my movie library. This is certainly because I use playlists for each item of my menu. So I will try calling my playlists. Otherwise I saw that there was the word "select" which allow access to the element on which one is during navigation. I tried and it works.

It opens the Movie library for me.

3) Yes I know "Page up" and "page down". Would it be possible to make voice commands dependent on another voice command? For example:
Page down
-> again / next
Page up
-> again / next
Like that instead of repeating many times "page down" or "page up" to navigate in a list we could just say "page down" once and then shorter words like "next" or "again" (in French the sentences are often longer than in English ).

It's not really the intention of the skill to use it this way all the time. Mostly, we intend for you to just ask for a specific media title, search for one, or for her to recommend something for you. For browsing, there really will never be a replacement for physical buttons.

4) How did the Germans manage to improve Alexa's understanding of invoking the names of the media to play?

It got better on Amazon's side with time. Nothing that we have done. The skill is dependent on what Amazon passes to it. We can assist you if you have particular titles that don't seem to be coming through. We would need to know what Alexa actually heard (in the History on your Alexa app) and what the Kanzi Card says.