Background of the issue:
I am importing WooCommerce product categories in three languages (EN, DE, JA) using WP All Import Pro and the WPML All Import plugin. The CSV files contain all the required WPML fields: _wpml_import_language_code, _wpml_import_source_language_code, and _wpml_import_translation_group. For example, EN rows contain: _wpml_import_language_code = en, _wpml_import_source_language_code = en, _wpml_import_translation_group = 92. DE rows contain: _wpml_import_language_code = de, _wpml_import_source_language_code = en, _wpml_import_translation_group = 92. JA rows contain: _wpml_import_language_code = ja, _wpml_import_source_language_code = en, _wpml_import_translation_group = 92. I also set the Unique Identifier for DE and JA imports as recommended: {_wpml_import_translation_group}-{_wpml_import_language_code}. This ensures EN, DE, and JA categories do not overwrite each other.
Symptoms:
Even after a correct import, WPML does not link the categories as translations. WPML does not show Schwimmanzüge as the German translation of Swimsuits. In Products → Categories → Edit, the WPML translation box shows no linked translations. In WPML → Taxonomy Translation → Product Categories, the EN, DE, and JA terms do not appear in the same row.
Questions:
Why does WPML not link the categories as translations after import?
How can I ensure that WPML translation metadata is applied during import?
