due to your suggested process, my website created multiple posts in different languages those now showing in English and also hundred of products created without images of different languages those are showing in English too.
Welcome to the WPML support forum. I will do my best to help you to resolve the issue.
Sorry for the inconvenience. It looks like the Duplicate products are added while doing *Set language information* action of WPML Troubleshooting steps. Normally it will not happen and it is happening for the first time in my experience. Most probably there may be a chance some corrupt entries in the database.
Therefore I have shared the details with our second-tier team for the expert opinion and waiting for their feedback. We will get back to you as early as possible. Please wait.
Just to make sure, have you taken a full site backup before doing WPML Troubleshooting steps?