There is a wizard tab for Protege 3 to add multiple instances at once, but not for Protege 5. How may I add multiple instances to a class at once, for example copy & paste them from Excel to Protege?
Try to use Cellfie plugin.
It is bundled with Protégé 5.2.0 and available from Tools > Create axioms from Excel workbook...
Mapping language for transformation rules is described here.
In fact, it is just a Manchester syntax dialect with spreadsheet references.