In the object-model viewer, look under the convertToText () method of tables:
myTable.convertToText ("\t", "\r");
converts the table to text, with tabs as column separators and returns as line separators. Then import the table in Excel.
Of course you can read amended/localized Excel files back into inDesign the same way, provided that the tables match (nr of rows and columns).
Afterwards you could loop through the characters of each cell to apply the formatting that you want to keep in Excel, such as SuperScripts.
Hope it helps you.
Set myExcel = CreateObject("Excel.Application")
myExcel.Visible = True
Set myTableBook = myExcel.Workbooks.Add
Set myTableSheet = myTableBook.Worksheets.Item(1)
myTableSheet.Columns.ColumnWidth = 35
myTableSheet.Cells.VerticalAlignment = xlVAlignTop
myTableSheet.Cells.WrapText = True
For R = 1 To myTable.Rows.Count
Set myTableRow = myTable.Rows.Item(R)
For C = 1 To myTableRow.Cells.Count
Set myTableCell = myTableRow.Cells.Item(C)
If Len(myTableCell.Contents) = 0 Then
myTableSheet.Cells(R, C) = ""
myTableSheet.Cells(R, C) = myTableCell.Contents
myTableSheet.Cells(R, C).Value = Replace(myTableSheet.Cells(R, C).Value, "1397058884", "—")
myTableSheet.Cells(R, C).Value = Replace(myTableSheet.Cells(R, C).Value, Chr(13), Chr(10))