Here you go.

Sub test()
    Dim s As String
    s = "hello world"
    MsgBox translate_using_vba(s)

End Sub

Function translate_using_vba(str) As String
' Tools Refrence Select Microsoft internet Control


    Dim IE As Object, i As Long
    Dim inputstring As String, outputstring As String, text_to_convert As String, result_data As String, CLEAN_DATA

    Set IE = CreateObject("InternetExplorer.application")
    '   TO CHOOSE INPUT LANGUAGE

    inputstring = "auto"

    '   TO CHOOSE OUTPUT LANGUAGE

    outputstring = "es"

    text_to_convert = str

    'open website

    IE.Visible = False
    IE.navigate "http://translate.google.com/#" & inputstring & "/" & outputstring & "/" & text_to_convert

    Do Until IE.ReadyState = 4
        DoEvents
    Loop

    Application.Wait (Now + TimeValue("0:00:5"))

    Do Until IE.ReadyState = 4
        DoEvents
    Loop

    CLEAN_DATA = Split(Application.WorksheetFunction.Substitute(IE.Document.getElementById("result_box").innerHTML, "</SPAN>", ""), "<")

    For j = LBound(CLEAN_DATA) To UBound(CLEAN_DATA)
        result_data = result_data & Right(CLEAN_DATA(j), Len(CLEAN_DATA(j)) - InStr(CLEAN_DATA(j), ">"))
    Next


    IE.Quit
    transalte_using_vba = result_data


End Function

This is how I would do it. It's function with optional enumeration objects that point to language codes used by google translate. For simplicity I only included a few language codes. Also, in this sample I selected the Microsoft Internet Controls reference so instead of creating an object, there's an InternetExplorer object used. And finally, to get rid of having to clean up the output, I just used .innerText rather than .innerHTML. Keep in mind, there's a character limit of around 3000 or so with google translate, and also, you must set IE=nothing especially if you will be using this multiple times, otherwise you will create multiple IE processes and eventually it won't work anymore.

Setup...

Option Explicit

Const langCode = ("auto,en,fr,es")

Public Enum LanguageCode
    InputAuto = 0
    InputEnglish = 1
    InputFrench = 2
    InputSpanish = 3
End Enum

Public Enum LanguageCode2
    ReturnEnglish = 1
    ReturnFrench = 2
    ReturnSpanish = 3
End Enum

Test...

Sub Test()

Dim msg As String

msg = "Hello World!"

MsgBox AutoTranslate(msg, InputEnglish, ReturnSpanish)

End Sub

Function...

Public Function AutoTranslate(ByVal Text As String, Optional LanguageFrom As LanguageCode, Optional LanguageTo As LanguageCode2) As String

Dim langFrom As String, langTo As String, IE As InternetExplorer, URL As String, myArray

If IsMissing(LanguageFrom) Then
    LanguageFrom = InputAuto
End If
If IsMissing(LanguageTo) Then
    LanguageTo = ReturnEnglish
End If

myArray = Split(langCode, ",")
langFrom = myArray(LanguageFrom)
langTo = myArray(LanguageTo)

URL = "https://translate.google.com/#" & langFrom & "/" & langTo & "/" & Text

Set IE = New InternetExplorer

IE.Visible = False
IE.Navigate URL

    Do Until IE.ReadyState = 4
        DoEvents
    Loop

    Application.Wait (Now + TimeValue("0:00:5"))

    Do Until IE.ReadyState = 4
        DoEvents
    Loop

    AutoTranslate = IE.Document.getElementByID("result_box").innerText

    IE.Quit

    Set IE = Nothing


End Function