Welcome to WPML support. I will try to answer the question before the ticket is assigned to one of my colleagues.
As a first step, please update WPML string translation plug-in to version 3.2.16.
- IMPORTANT STEP! Create a backup of your website. Or better approach will be to test this on a copy/staging version of the website to avoid any disruption of a live website.
- Go to "WordPress Dashboard > Plugins > Add new > Commercial (tab)".
- Click the "Check for Updates" button.
- Update WPML and its addons there.
After that, please follow the erratum below to find some strings that are not found if you search in WPS strength translation then using WpResidence theme: