https://wpml.org/plugin-functionality/form/page/2/
Recommended Forms plugins for multilingual sites
Productive Forms is compatible with WPML. This plugin or theme has been tested thoroughly, and you can use it to build multilingual sites without experiencing...
recommended formspluginsmultilingualsites
https://www.hcch.net/es/news-archive/details/?varevent=964&fbclid=IwAR1n2Cq6CMY83VQOgvhTvM8usWUu0303Oq7-dXFLjTxO42S27s1IA20q8Ds
HCCH | Publication of the Recommended Model Forms for use under the 1993 Adoption Convention
Hague Conference on Private International Law - The World Organisation for Cross-border Co-operation in Civil and Commercial Matters