Personally I would not etch this particular blade.  The scabbard is quite unusual.  I wonder what language the script is?  The floral motif does look as if it has Indian influence but I can not help thinking that it might be Islamic in origin and not really have anything to do with the Naga peoples Indian or Burmese.  It is just a feeling do not take my word for it.  first get that script seen to 

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