Change default language of Powerpoint 2010

changeLanguage.vb

Sub ChangeProofingLanguageToEnglish()
    Dim j, k As Integer
    Dim languageID As MsoLanguageID

    'Set this to your preferred language
    languageID = msoLanguageIDEnglishUK

    For j = 1 To ActivePresentation.Slides.Count
        For k = 1 To ActivePresentation.Slides(j).Shapes.Count
            ChangeAllSubShapes ActivePresentation.Slides(j).Shapes(k), _
              languageID
        Next k
    Next j
End Sub


Sub ChangeAllSubShapes(targetShape As shape, languageIaD As MsoLanguageID)
    Dim i As Integer

    If targetShape.HasTextFrame Then
        targetShape.TextFrame.TextRange.languageID = languageID
    End If

    Select Case targetShape.Type
        Case msoGroup, msoSmartArt
            For i = 1 To targetShape.GroupItems.Count
                ChangeAllSubShapes targetShape.GroupItems.Item(i), languageID
            Next i
    End Select
End Sub