Welcome to the WPML support forum. I will do my best to help you to resolve the issue.
For your kind information, the *Cartflows* plugin is not included on the WPML official compatibility list for the Plugins - https://wpml.org/plugin/. It does not mean that this plugin is not compatible with WPML, but our compatibility team has not tested it yet.
In the past, we suggested translating it manually. Please try the workarounds suggested in the following tickets after a full site backup.