Get singular / plural form of a given word. Support for 5+ languages.

Smart, Seamless Pluralization for Any Application

Never worry about awkward plurals again! Our Pluralization API takes the guesswork out of handling singular and plural word forms, supporting complex rules, irregular nouns, and multiple languages. Whether you're building a dynamic UI, localizing content, or automating text generation, our API ensures grammatical accuracy with ease. Say goodbye to clunky if-else statements and let our API handle the linguistics—effortlessly. Try it now and make your text smarter! Supports English,French,Spanish,Turkish,Portuguese,Norwegian-bokmal.

API Endpoint

 https://api.interfaces.one

Pluralization API

  GET /pluralize
    parameters
           word=<word>

The above call should produce some like below.

{
    "success": {
        "total": 3
    },
    "contents": {
        "original": "child",
        "singular": "child",
        "plural": "children"
    },
    "copyright": {
        "url": "api.interfaces.one",
        "year": "2025"
    }
}

Ratelimiting

Some of our API calls may be public(requires free API key) , while others requires paid subscription. To maintain our serice levels both public and private API endpoints are ratelimited. Please consult your specific plan that you subscribed to for the rate limit details.

Authentication

Currently we support API Key based authentication. Please set your Autorization Bearer request header with value of your API key. Alternatively you can also pass api_key= as a request parameter, though we strongly discourage this mode of passing the key, since it will allow others to see your key.

In curl this would mean sending the Authorization header like below.

            
 curl -i <url> -H "Authorization: Bearer <api_key>"
            
            

If you are using PHP.

            
$authorization = "Authorization: Bearer <api_key>";
$ch = curl_init('<url>'); // Initialise cURL
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json' , $authorization ));
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST"); // OR GET
$result = curl_exec($ch);
curl_close($ch);
            
            

In javascript you can use headers key to add the authorization header

            
$.ajax({
   url: '<url>'
   type: 'GET',
   contentType: 'application/json'
   headers: {
      'Authorization': 'Bearer <api_key>'
   },
   success: function (result) {
       // CallBack(result);
   },
   error: function (error) {

   }
});