Polylang | Gato GraphQL for WordPress

Integration with the Polylang plugin (and also Polylang PRO).

The GraphQL schema is provided the fields to retrieve multilingual data.

Types `Root`/`QueryRoot`

Query the site metadata configured in Polylang.

Field	Description
`polylangDefaultLanguage`	Default language on Polylang, or `null` if there are no languages enabled.
`polylangEnabledLanguages`	Enabled languages on Polylang.

Running this query:

{
  polylangDefaultLanguage
  polylangEnabledLanguages
}

...might produce:

{
  "data": {
    "polylangDefaultLanguage": "en",
    "polylangEnabledLanguages": [
      "en",
      "es",
      "fr"
    ]
  }
}

Types `Post`, `Page`, `PostTag`, `PostCategory` and `Media`

Query the language for the entity, and the IDs for the translations for that entity.

These types implement interface PolylangTranslatable. (Type Media does only when media support is enabled, via the Polylang settings.)

Field	Description
`polylangLanguage`	Language code of the post or page, or `null` if no language was assigned (eg: Polylang was installed later on).
`polylangTranslationLanguageIDs`	Nodes for all the translation languages for the entity, as a JSON object with the language code as key and entity ID as value, or `null` if no language was assigned (eg: Polylang was installed later on).

Field polylangTranslationLanguageIDs provides the post/page IDs for all the translations. It accepts field includeSelf, to indicate if to include the queried entity's ID in the results (it's false by default).

Running this query:

{
  posts {
    __typename
    id
    title
    polylangLanguage
    polylangTranslationLanguageIDs
    polylangTranslationLanguageIDsWithSelf: polylangTranslationLanguageIDs(filter: { includeSelf: true })
 
    categories {
      __typename
      id
      name
      polylangLanguage
      polylangTranslationLanguageIDs
      polylangTranslationLanguageIDsWithSelf: polylangTranslationLanguageIDs(filter: { includeSelf: true })
    }
    
    tags {
      __typename
      id
      name
      polylangLanguage
      polylangTranslationLanguageIDs
      polylangTranslationLanguageIDsWithSelf: polylangTranslationLanguageIDs(filter: { includeSelf: true })
    }
  }
 
  pages {
    __typename
    id
    title
    polylangLanguage
    polylangTranslationLanguageIDs
    polylangTranslationLanguageIDsWithSelf: polylangTranslationLanguageIDs(filter: { includeSelf: true })
  }
 
  mediaItems {
    __typename
    id
    title
    polylangLanguage
    polylangTranslationLanguageIDs
    polylangTranslationLanguageIDsWithSelf: polylangTranslationLanguageIDs(filter: { includeSelf: true })
  }
}

...might produce:

{
  "data": {
    "posts": [
      {
        "__typename": "Post",
        "id": 1668,
        "title": "Some post translated using Polylang",
        "polylangLanguage": "en",
        "polylangTranslationLanguageIDs": {
          "fr": 1670,
          "es": 1672
        },
        "polylangTranslationLanguageIDsWithSelf": {
          "en": 1668,
          "fr": 1670,
          "es": 1672
        },
        "categories": [
          {
            "__typename": "PostCategory",
            "id": 61,
            "name": "Category for Polylang",
            "polylangLanguage": "en",
            "polylangTranslationLanguageIDs": {
              "fr": 63,
              "es": 65
            },
            "polylangTranslationLanguageIDsWithSelf": {
              "en": 61,
              "fr": 63,
              "es": 65
            }
          }
        ],
        "tags": [
          {
            "__typename": "PostTag",
            "id": 67,
            "name": "Tag for Polylang",
            "polylangLanguage": "en",
            "polylangTranslationLanguageIDs": {
              "fr": 69,
              "es": 71
            },
            "polylangTranslationLanguageIDsWithSelf": {
              "en": 67,
              "fr": 69,
              "es": 71
            }
          }
        ]
      }
    ],
    "pages": [
      {
        "__typename": "Page",
        "id": 1674,
        "title": "Some page translated using Polylang",
        "polylangLanguage": "en",
        "polylangTranslationLanguageIDs": {
          "fr": 1676,
          "es": 1678
        },
        "polylangTranslationLanguageIDsWithSelf": {
          "en": 1674,
          "fr": 1676,
          "es": 1678
        }
      }
    ],
    "mediaItems": [
      {
        "__typename": "Media",
        "id": 40,
        "title": "Media-for-Polylang",
        "polylangLanguage": "en",
        "polylangTranslationLanguageIDs": {
          "fr": 42,
          "es": 44
        },
        "polylangTranslationLanguageIDsWithSelf": {
          "en": 40,
          "fr": 42,
          "es": 44
        }
      }
    ]
  }
}

Types `GenericCustomPost`, `GenericTag` and `GenericCategory`

These types implement interface PolylangMaybeTranslatable.

GenericCustomPost is a type used to represent any custom post installed on the site, such as Portfolio, Event, Product, or other. Similarly, GenericTag and GenericCategory are used to represent their taxonomies.

Each of these CPTs and taxonomies can be defined to be translatable on the Polylang settings. Fields polylangLanguage and polylangTranslationLanguageIDs will then have the same behavior as for Post and the others (described above), and also return null if the entity's CPT or taxonomy is not configured to be translated.

In addition, field polylangIsTranslatable indicates if the CPT or taxonomy is configured to be translatable.

Field	Description
`polylangLanguage`	Language code of the post or page, or `null` if no language was assigned (eg: Polylang was installed later on), or if the entity is not configured to be translated (via Polylang Settings).
`polylangTranslationLanguageIDs`	Nodes for all the translation languages for the entity, as a JSON object with the language code as key and entity ID as value, or `null` if no language was assigned (eg: Polylang was installed later on), or if the entity is not configured to be translated (via Polylang Settings).
`polylangIsTranslatable`	Indicate if the entity can be translated.

Running this query:

{
  customPosts(filter: { customPostTypes: ["some-cpt", "another-cpt"] }) {
    __typename
    ...on GenericCustomPost {
      id
      title
      customPostType
      polylangIsTranslatable
      polylangLanguage
      polylangTranslationLanguageIDs
      polylangTranslationLanguageIDsWithSelf: polylangTranslationLanguageIDs(filter: { includeSelf: true })
      
      categories(taxonomy: "some-category") {
        __typename
        ...on GenericCategory {
          id
          name
          polylangIsTranslatable
          polylangLanguage
          polylangTranslationLanguageIDs
          polylangTranslationLanguageIDsWithSelf: polylangTranslationLanguageIDs(filter: { includeSelf: true })
        }
      }
      
      tags(taxonomy: "some-tag") {
        __typename
        ...on GenericTag {
          id
          name
          polylangIsTranslatable
          polylangLanguage
          polylangTranslationLanguageIDs
          polylangTranslationLanguageIDsWithSelf: polylangTranslationLanguageIDs(filter: { includeSelf: true })
        }
      }
    }
  }
}

...might produce:

{
  "data": {
    "customPosts": [
      {
        "__typename": "GenericCustomPost",
        "id": 10,
        "title": "Some CPT that has Polylang translation enabled",
        "customPostType": "some-cpt",
        "polylangIsTranslatable": true,
        "polylangLanguage": "en",
        "polylangTranslationLanguageIDs": {
          "fr": 12,
          "es": 14
        },
        "polylangTranslationLanguageIDsWithSelf": {
          "en": 10,
          "fr": 12,
          "es": 14
        },
        "categories": [
          {
            "__typename": "GenericCategory",
            "id": 30,
            "name": "Some Category for Polylang",
            "polylangIsTranslatable": true,
            "polylangLanguage": "en",
            "polylangTranslationLanguageIDs": {
              "fr": 32,
              "es": 34
            },
            "polylangTranslationLanguageIDsWithSelf": {
              "en": 30,
              "fr": 32,
              "es": 34
            }
          }
        ],
        "tags": [
          {
            "__typename": "GenericTag",
            "id": 50,
            "name": "Some Tag for Polylang",
            "polylangIsTranslatable": true,
            "polylangLanguage": "en",
            "polylangTranslationLanguageIDs": {
              "fr": 52,
              "es": 54
            },
            "polylangTranslationLanguageIDsWithSelf": {
              "en": 50,
              "fr": 52,
              "es": 54
            }
          }
        ]
      },
      {
        "__typename": "GenericCustomPost",
        "id": 20,
        "title": "Another CPT that does not have Polylang translation enabled",
        "customPostType": "another-cpt",
        "polylangIsTranslatable": false,
        "polylangLanguage": null,
        "polylangTranslationLanguageIDs": null,
        "polylangTranslationLanguageIDsWithSelf": null,
        "categories": [
          {
            "__typename": "GenericCategory",
            "id": 70,
            "name": "Category without support for Polylang",
            "polylangIsTranslatable": false,
            "polylangLanguage": null,
            "polylangTranslationLanguageIDs": null,
            "polylangTranslationLanguageIDsWithSelf": null
          }
        ],
        "tags": [
          {
            "__typename": "GenericTag",
            "id": 72,
            "name": "Tag without support for Polylang",
            "polylangIsTranslatable": false,
            "polylangLanguage": null,
            "polylangTranslationLanguageIDs": null,
            "polylangTranslationLanguageIDsWithSelf": null
          }
        ]
      }
    ]
  }
}

​Types Root/QueryRoot

​Types Post, Page, PostTag, PostCategory and Media

​Types GenericCustomPost, GenericTag and GenericCategory

Types `Root`/`QueryRoot`

Types `Post`, `Page`, `PostTag`, `PostCategory` and `Media`

Types `GenericCustomPost`, `GenericTag` and `GenericCategory`