Problem: You are using the WPML plugin with Max Mega Menu on your multilingual WordPress site and experiencing issues where submenu icons disappear or appear blurry in translated menus. You are wondering if the 'Synchronize menus between languages' option could resolve this. Solution: Unfortunately, Max Mega Menu is not fully compatible with WPML. To handle translated menus, you need to create them from scratch for each language as outlined in Max Mega Menu's documentation, which you can find here: https://www.megamenu.com/documentation/wpml-setup/. We recommend setting up a testing environment to replicate your menu setup and confirm the behavior. Here's a link to a testing site where you can do this: https://unique-accordion.sandbox.otgs.work/?auto=QDikoduZmXkvDEZLG2B25k9JxeUUrgvs.
If this solution does not apply to your case, or if it seems outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If issues persist, please open a new support ticket at WPML support forum for further assistance.