GitHub GraphQL filter multi variable language filter

As a workaround, you can use aliases to build dynamic query with many search query targetting a specific language and fragments to avoid repetition of the SearchResultItemConnection in the query :

{
  go: search(query: "language:go", type: REPOSITORY, first: 10) {
    ...SearchResult
  }
  java: search(query: "language:java", type: REPOSITORY, first: 10) {
    ...SearchResult
  }
  javascript: search(query: "language:javascript", type: REPOSITORY, first: 10) {
    ...SearchResult
  }
}

fragment SearchResult on SearchResultItemConnection {
  repositoryCount
  edges {
    node {
      ... on Repository {
        nameWithOwner
        forkCount
        hasIssuesEnabled
        hasProjectsEnabled
        homepageUrl
        id
      }
    }
  }
}

Try it in the explorer

Note that it would only work for OR query (java or javascript or go for the list of languages) but not AND

The request can be built programmatically such as in this python script :

import requests

token = "YOUR_TOKEN"
languages = ["go","java","javaScript"]

query = """
{
  %s
}

fragment SearchResult on SearchResultItemConnection {
  repositoryCount
  edges {
    node {
      ... on Repository {
        nameWithOwner
        forkCount
        hasIssuesEnabled
        hasProjectsEnabled
        homepageUrl
        id
      }
    }
  }
}
"""

searchFragments = "".join([
    """
    %s: search(query: "language:%s", type: REPOSITORY, first: 10) {
      ...SearchResult
    }
    """ % (t,t) for t in languages
])
r = requests.post("https://api.github.com/graphql",
    headers = {
        "Authorization": f"Bearer {token}"
    },
    json = {
        "query": query % searchFragments
    }
)
print(r.json()["data"])