The following code example accesses the Research object of the document to set the default language pair that is used in the translation service. It sets English (US) as the language of the source text to translate from and Japanese as the language to translate the text to. The default translation languages appear in the Research pane in Word under the Translation section.
This example is for a document-level customization.
Private Sub SetTranslationLanguages()
Me.Research.SetLanguagePair(Word.WdLanguageID.wdEnglishUS, _
Word.WdLanguageID.wdJapanese)
End Sub
private void SetTranslationLanguages()
{
this.Research.SetLanguagePair(Word.WdLanguageID.wdEnglishUS,
Word.WdLanguageID.wdJapanese);
}