Translating Languages In Delphi

Question

I have been looking for ages now for some code that can translate any language to another but none of the code I find works.
I know Google has a good translate API but I can't get anyone's Delphi code on it to work.
There is always an error that comes in the way. Any help would be much appreciated, I need a program that can translate ASAP of my final school project.

Answer 1

The Google Translate API is a good option, but now is available only as a paid service. Instead you can try the Microsoft Translator V2 API, check this article Using the Microsoft Translator V2 API from delphi for more details about how use this API from delphi.

UPDATE This is the same demo project of the article modified to be compatible with your version of delphi.

program MicrosoftTranslatorApi;

{$APPTYPE CONSOLE}

uses
  ShellApi,
  ActiveX,
  Classes,
  ComObj,
  Variants,
  Windows,
  WinInet,
  SysUtils;

const
   MicrosoftTranslatorTranslateUri = 'http://api.microsofttranslator.com/v2/Http.svc/Translate?appId=%s&text=%s&from=%s&to=%s';
   MicrosoftTranslatorDetectUri    = 'http://api.microsofttranslator.com/v2/Http.svc/Detect?appId=%s&text=%s';
   MicrosoftTranslatorGetLngUri    = 'http://api.microsofttranslator.com/v2/Http.svc/GetLanguagesForTranslate?appId=%s';
   MicrosoftTranslatorGetSpkUri    = 'http://api.microsofttranslator.com/v2/Http.svc/GetLanguagesForSpeak?appId=%s';
   MicrosoftTranslatorSpeakUri     = 'http://api.microsofttranslator.com/v2/Http.svc/Speak?appId=%s&text=%s&language=%s';
   //this AppId if for demo only please be nice and use your own , it's easy get one from here http://msdn.microsoft.com/en-us/library/ff512386.aspx
   BingAppId                       = '73C8F474CA4D1202AD60747126813B731199ECEA';
   Msxml2_DOMDocument              = 'Msxml2.DOMDocument.6.0';

procedure WinInet_HttpGet(const Url: string;Stream:TStream);overload;
const
BuffSize = 1024*1024;
var
  hInter   : HINTERNET;
  UrlHandle: HINTERNET;
  BytesRead: DWORD;
  Buffer   : Pointer;
begin
  hInter := InternetOpen('', INTERNET_OPEN_TYPE_PRECONFIG, nil, nil, 0);
  if Assigned(hInter) then
    try
      Stream.Seek(0,0);
      GetMem(Buffer,BuffSize);
      try
          UrlHandle := InternetOpenUrl(hInter, PChar(Url), nil, 0, INTERNET_FLAG_RELOAD, 0);
          if Assigned(UrlHandle) then
          begin
            repeat
              InternetReadFile(UrlHandle, Buffer, BuffSize, BytesRead);
              if BytesRead>0 then
               Stream.WriteBuffer(Buffer^,BytesRead);
            until BytesRead = 0;
            InternetCloseHandle(UrlHandle);
          end;
      finally
        FreeMem(Buffer);
      end;
    finally
     InternetCloseHandle(hInter);
    end;
end;

function WinInet_HttpGet(const Url: string): string;overload;
Var
  StringStream : TStringStream;
begin
  Result:='';
    StringStream:=TStringStream.Create('');
    try
        WinInet_HttpGet(Url,StringStream);
        if StringStream.Size>0 then
        begin
          StringStream.Seek(0,0);
          Result:=StringStream.ReadString(StringStream.Size);
        end;
    finally
      StringStream.Free;
    end;
end;

function TranslateText(const AText,SourceLng,DestLng:string):string;
var
   XmlDoc : OleVariant;
   Node   : OleVariant;
begin
  Result:=WinInet_HttpGet(Format(MicrosoftTranslatorTranslateUri,[BingAppId,AText,SourceLng,DestLng]));
  XmlDoc:= CreateOleObject(Msxml2_DOMDocument);
  try
    XmlDoc.Async := False;
    XmlDoc.LoadXML(Result);
    if (XmlDoc.parseError.errorCode <> 0) then
     raise Exception.CreateFmt('Error in Xml Data %s',[XmlDoc.parseError]);
    Node:= XmlDoc.documentElement;
    if not VarIsClear(Node) then
     Result:=XmlDoc.Text;
  finally
     XmlDoc:=Unassigned;
  end;
end;

function DetectLanguage(const AText:string ):string;
var
   XmlDoc : OleVariant;
   Node   : OleVariant;
begin
  Result:=WinInet_HttpGet(Format(MicrosoftTranslatorDetectUri,[BingAppId,AText]));
  XmlDoc:= CreateOleObject(Msxml2_DOMDocument);
  try
    XmlDoc.Async := False;
    XmlDoc.LoadXML(Result);
    if (XmlDoc.parseError.errorCode <> 0) then
     raise Exception.CreateFmt('Error in Xml Data %s',[XmlDoc.parseError]);
    Node:= XmlDoc.documentElement;
    if not VarIsClear(Node) then
      Result:=XmlDoc.Text;
  finally
     XmlDoc:=Unassigned;
  end;
end;

function GetLanguagesForTranslate: TStringList;
var
   XmlDoc : OleVariant;
   Node   : OleVariant;
   Nodes  : OleVariant;
   lNodes : Integer;
   i      : Integer;
   sValue : string;
begin
  Result:=TStringList.Create;
  sValue:=WinInet_HttpGet(Format(MicrosoftTranslatorGetLngUri,[BingAppId]));
  XmlDoc:= CreateOleObject(Msxml2_DOMDocument);
  try
    XmlDoc.Async := False;
    XmlDoc.LoadXML(sValue);
    if (XmlDoc.parseError.errorCode <> 0) then
     raise Exception.CreateFmt('Error in Xml Data %s',[XmlDoc.parseError]);
    Node:= XmlDoc.documentElement;
    if not VarIsClear(Node) then
    begin
      Nodes := Node.childNodes;
       if not VarIsClear(Nodes) then
       begin
         lNodes:= Nodes.Length;
           for i:=0 to lNodes-1 do
            Result.Add(Nodes.Item(i).Text);
       end;
    end;
  finally
     XmlDoc:=Unassigned;
  end;
end;

function GetLanguagesForSpeak: TStringList;
var
   XmlDoc : OleVariant;
   Node   : OleVariant;
   Nodes  : OleVariant;
   lNodes : Integer;
   i      : Integer;
   sValue : string;
begin
  Result:=TStringList.Create;
  sValue:=WinInet_HttpGet(Format(MicrosoftTranslatorGetSpkUri,[BingAppId]));
  XmlDoc:= CreateOleObject(Msxml2_DOMDocument);
  try
    XmlDoc.Async := False;
    XmlDoc.LoadXML(sValue);
    if (XmlDoc.parseError.errorCode <> 0) then
     raise Exception.CreateFmt('Error in Xml Data %s',[XmlDoc.parseError]);
    Node:= XmlDoc.documentElement;
    if not VarIsClear(Node) then
    begin
      Nodes := Node.childNodes;
       if not VarIsClear(Nodes) then
       begin
         lNodes:= Nodes.Length;
           for i:=0 to lNodes-1 do
            Result.Add(Nodes.Item(i).Text);
       end;
    end;
  finally
     XmlDoc:=Unassigned;
  end;
end;

procedure Speak(const FileName,AText,Lng:string);
var
  Stream : TFileStream;
begin
  Stream:=TFileStream.Create(FileName,fmCreate);
  try
    WinInet_HttpGet(Format(MicrosoftTranslatorSpeakUri,[BingAppId,AText,Lng]),Stream);
  finally
     Stream.Free;
  end;
end;

var
 lng       : TStringList;
 i         : Integer;
 FileName  : string;

begin
 try
    CoInitialize(nil);
    try
      Writeln(TranslateText('Hello World','en','es'));
      Writeln(DetectLanguage('Hello World'));

      Writeln('Languages for translate supported');
      lng:=GetLanguagesForTranslate;
      try
        for i:=0 to lng.Count-1 do
         Writeln(lng[i]);
      finally
        lng.free;
      end;

      Writeln('Languages for speak supported');
      lng:=GetLanguagesForSpeak;
      try
        for i:=0 to lng.Count-1 do
         Writeln(lng[i]);
      finally
        lng.free;
      end;

      FileName:=ExtractFilePath(ParamStr(0))+'Demo.wav';
      Speak(FileName,'This is a demo using the Microsoft Translator Api from delphi, enjoy','en');
      ShellExecute(0, 'open', PChar(FileName),nil,nil, SW_SHOWNORMAL) ;

    finally
      CoUninitialize;
    end;
 except
    on E:Exception do
        Writeln(E.Classname, ':', E.Message);
 end;
 Writeln('Press Enter to exit');
 Readln;
end.

Answer 2

Maybe you did not find Marco Cantu's works?Works with REST/AJAX/Delphi

But as RRUZ said, the Google Translate API is only available now as a paid service.