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Overview of the issue
When using the Essential Addons for Elementor’s Filterable Gallery widget with WPML, the following fields; eael_fg_control, eael_fg_gallery_item_name, eael_fg_gallery_control_name, eael_fg_gallery_item_video_link, fg_item_cat fields cannot be translated.
Workaround
Add the following XML in WPML > Setting > Custom XML Configuration:
<wpml-config>
<elementor-widgets>
<widget name=“eael-filterable-gallery“>
<fields-in-item items_of=“eael_fg_gallery_items“>
<field type=“Filterable Gallery: eael_fg_gallery_item_name“ editor_type=“LINE“>eael_fg_gallery_item_name</field>
<field type=“Filterable Gallery: eael_fg_gallery_control_name“ editor_type=“LINE“>eael_fg_gallery_control_name</field>
<field type=“Filterable Gallery: Item Link“ editor_type=“LINK“>eael_fg_gallery_item_video_link</field>
<field type=“Filterable Gallery: Item Category“ editor_type=“LINE“>fg_item_cat</field>
</fields-in-item>
<fields-in-item items_of=“eael_fg_controls“>
<field type=“Filterable Gallery: Category“ editor_type=“LINE“>eael_fg_control</field>
</fields-in-item>
</widget>
</elementor-widgets>
</wpml-config>
Then apply a small edit to the post for these new fields to load in the translation editor.