I have a kinjal with some script on it,I posted a picture of the script on a translator forum and this is what the translation said(according to the translator)
"The sentence says: "la fata ella Ali (the first line), la sayf ella dhol-feqar". 
Its mean is: "No boy except 'Ali', no sword except 'dhol-feqar'". 
If you want explanation of it, here it is: 
'Ali' is the name of 'Al-Imam Ali ibn Abi Talib (Karraml-lahu wajhahw)'. 
He is the cousin of the Prophet Muhammad (3alayhis-sallam). 
'dhol-feqar' is the name of Imam Ali's sword. 
This sentence is said by Shi'a Muslims. "
 I thought it was interesting (funny thing I just found out about an hour ago after months of searching)
Here is the Kinjal with the script
