Upon initial investigation, we have found out that you are using an older version of the string translation plugin.
By our testing it improved the page load by updating WPML String translation from 3.2.6 to 3.2.7.
- 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.