you can also start the dispatcher in debug mode to check what’s going on there.   https://nhutils.ru/blog/en/how-to-set-up-redirect-by-language-in-htaccess/

Use pipe like (cn|de|fr)/.*$ [NC]

Basically you can use sling model to write your backend code to read the csv data and expose it on the HTML as we use it normally. On the same sling model you can you use sling model exporter as well using https://medium.com/@toimrank/aem-sling-model-exporter-90dc872835b9.  by default you access the...

Are you seeing this issue on author, publisher or dispatcher or on all 3. on author and publisher it should start with /content/sitename/locale/page.html and on dispatcher it should be without /content/sitename 

You can write sling model exporter that can read value from csv file and can be used to write data in html as well exposed it as JSON using model.json

You can write Apache rewrite rules for each individual language to have redirect to appropriate location

You can achieve this in 2 ways I believe. Using sightly x-cq-linkchecker="valid" and OSGI configs. http://www.wemblog.com/2011/10/how-to-make-sure-that-links-are-always.html?m=1 its possible that some time even after changing the OSGI configs the link checker might not have run again. Check this to ...

You can always run 2 application running on different Java version at same time. You can achieve this by setting one as default using system environment variable in your case it’s going to be JDK 8. Install JDK 11 and whenever you want to use application to run on JDK 11 you can set the java path te...

Do you see any thing in the log for exception. I think  workspace.move And   resourceResolver.move do the same thing. It might be failing because the destination might have the same node already present 

there are various ways to achieve this as mentioned by @Rohit_Utreja @but I would prefer Crx2oak tools for migrating the crx data and is adobe recommend and can be used for bulk assets