Localized variants of any content object can be obtained using either the field localizedVariants or localizedVariant. The first will return all existing variants of a content object while the latter requires specific locale parameters in order to retrieve the variant of a specific variant.

query LocalizedVariants($path: String!) {
content {
  pageByPath(path: $path) {
    title
    type
    localizedVariants {
      ... on CMChannel {
        repositoryPath
        locale
      }
    }
    localizedVariant(language: "en", country: "us", variant: "") {
      ... on CMChannel {
        repositoryPath
        locale
      }
    }
  }
}
  }

With the locale specific approach, the parameter language is mandatory, while country and variant are optional. Please note, that if a given combination of locale parameters does not exist you may get an empty object. When skipping the parameter country however, the first variant matching the language will be returned.