Migrate a kallyas website from dev to prod environnement


My company utise the Kallyas (version 3.4) as its theme Wordpress(version 3.6) having finished the testing phase of the site we decided to migrate the site to the production environment. Having tried several processes of migration we recuellies on the net that seem very reliable. We still do not manage to achieve the same visual effect obtained in a test environment.
example, the content of certain pages is not displayed
language change is not properly effecctue

We have audited at the Wordpress admin interface and everything looks correct (plugins and theme are active, and all pages are present), similar to the database, we performed a dump database test that we matter to the database production
Hoping that all this information will help you find a solution to our issue
Best regards