[Resolved] Need to query posts in multiple languages with WPGraphQL

Problem:

You are building a multilingual WordPress site using WPML with WPGraphQL and the wp-graphql-wpml bridge plugin, and you want to fetch posts in multiple languages in a single GraphQL query. However, the current schema only accepts a single language value and does not support arrays or a language_in parameter.

Solution:

Currently, the WPGraphQL + WPML setup only allows fetching posts in one language at a time. As a workaround, we recommend running separate queries for each language in one request or a single query to list all posts. Here are two examples you can try:

query {
  posts {
    nodes {
      id
      title
      uri
      date
      content
      language {
        code
      }
    }
  }
}

Or

query {
  enPosts: posts(where: { language: EN }) {
    nodes {
      id
      title
      language {
        code
      }
    }
  }
  ptPosts: posts(where: { language: PT }) {
    nodes {
      id
      title
      language {
        code
      }
    }
  }
  esPosts: posts(where: { language: ES }) {
    nodes {
      id
      title
      language {
        code
      }
    }
  }
}

For more details, refer to our documentation on querying specific posts at https://wpml.org/documentation/related-projects/wpml-graphql/#querying-specific-posts.

If this solution does not apply to your case, or if it seems outdated, please check related known issues at https://wpml.org/known-issues/, verify the version of the permanent fix, and confirm that you have installed the latest versions of themes and plugins. We highly recommend opening a new support ticket if you need further assistance. You can do so at https://wpml.org/forums/forum/english-support/.