You can use google script which has FREE translate API. All you need is a common google account and do these THREE EASY STEPS.
1) Create new script with such code on google script:
var mock = {
parameter:{
q:'hello',
source:'en',
target:'fr'
}
};
function doGet(e) {
e = e || mock;
var sourceText = ''
if (e.parameter.q){
sourceText = e.parameter.q;
}
var sourceLang = '';
if (e.parameter.source){
sourceLang = e.parameter.source;
}
var targetLang = 'en';
if (e.parameter.target){
targetLang = e.parameter.target;
}
var translatedText = LanguageApp.translate(sourceText, sourceLang, targetLang, {contentType: 'html'});
return ContentService.createTextOutput(translatedText).setMimeType(ContentService.MimeType.JSON);
}
2) Click Publish -> Deploy as webapp -> Who has access to the app: Anyone even anonymous -> Deploy. And then copy your web app url, you will need it for calling translate API.
3) Use this java code for testing your API:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
public class Translator {
public static void main(String[] args) throws IOException {
String text = "Hello world!";
//Translated text: Hallo Welt!
System.out.println("Translated text: " + translate("en", "de", text));
}
private static String translate(String langFrom, String langTo, String text) throws IOException {
// INSERT YOU URL HERE
String urlStr = "https://your.google.script.url" +
"?q=" + URLEncoder.encode(text, "UTF-8") +
"&target=" + langTo +
"&source=" + langFrom;
URL url = new URL(urlStr);
StringBuilder response = new StringBuilder();
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestProperty("User-Agent", "Mozilla/5.0");
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
return response.toString();
}
}
As it is free, there are QUATA LIMITS: https://docs.google.com/macros/dashboard