<i>I had this problem on 4.0.0 version. I solved it but manually changing values in the database, it was quite difficult.</i>
I just reproduced this multilingual url aliases problem on 4.0.1.
I solved it by: - installing the ezurlaliasmigration (adding this on site.ini.append.php):
ActiveExtensions[]=ezurlaliasmigration
- Creating temporary ezurlalias_ml_migrate with schema.sql script in /extension/ezurlaliasmigration/sql/mysql/
- backup ezurlalias_ml table (we never know..).
- Truncate ezurlalias_ml table. - Executing updatenicceurls.php:
php bin/php/updatenicceurls.php
the ezurlalias_ml table is now full of new clean URLs!