Hi, To fix some issues we have, we want to transform translation files so that they have the same structure as the english base translation file. You can have a look at this test commit <https://github.com/atallahade/xwiki-platform/commit/5b89e1d2fd856af58b68b3ba446948ec3de6930d> to see what the migration is about. You obviously don't have to check every changes but if you manage to find something wrong somewhere, please let us know here.
We will lock the translations on l10.xwiki.org and do the migration once we know for sure that it will not create other issues. Also, be aware that future translations added to the platform will automatically be changed as soon as a first modification is made by a user. Thanks, Adel

