Problem: The client inquired if WPML can fully support Papiamentu as a custom language for page translations, integrate with automatic translation services, and if there are any limitations or best practices to consider. Solution: We informed the client that Papiamentu can be added as a custom language in WPML for manual translations across the site. However, for automatic translations, there are limitations since not all custom languages are supported by WPML's integrated translation engines. Although Google Translate supports Papiamentu, it is not supported directly by WPML's engines. We recommended checking the supported languages on https://ate.wpml.org/mt_langs. As a workaround, the client can map Papiamentu to a supported language for automatic translations.
If this solution does not apply to your case, or if it seems outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have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 further assistance is needed, please open a new support ticket at WPML support forum.