Can I replace Lard with Ghee in tortillas?
You could try substituting leaf lard for regular lard.

Lard has characteristics that make it perfect for tortillas.  But the big square bricks of MANTECA sometimes taste piggy even to me.  

Leaf lard is super premium lard from a particular part of the pig.  I have found it only at farmers markets and occasionally at specialty butchers but of course you could order on line.  It is expensive.  It is essentially tasteless.  I bought a tub and my daughter used the entire thing for pie crust, which my lardophobic wife ate merrily.