LanguagePreferencesDefaultEditingLanguage Property

public EditingLanguage DefaultEditingLanguage { get; set; }

Public Property DefaultEditingLanguage As EditingLanguage
	Get
	Set

public:
property EditingLanguage DefaultEditingLanguage {
	EditingLanguage get ();
	void set (EditingLanguage value);
}

member DefaultEditingLanguage : EditingLanguage with get, set

LoadOptions loadOptions = new LoadOptions();
// You can set language which only
loadOptions.LanguagePreferences.DefaultEditingLanguage = EditingLanguage.Russian;

Document doc = new Document(MyDir + "Document.docx", loadOptions);

int localeId = doc.Styles.DefaultFont.LocaleId;
Console.WriteLine(localeId == (int) EditingLanguage.Russian
    ? "The document either has no any language set in defaults or it was set to Russian originally."
    : "The document default language was set to another than Russian language originally, so it is not overridden.");