I can't smile

That is good that desi does not smile at desi. There will be tons of street fights if a desi smiles at other desi Starting with any one of the following opening sentences.

"Abay O-A toh maree biwi/bahan/baitee ko chair raha hay."

"Taree ghar main maan behnain nahee hain kia."

"Abay O-A bhawais hay kia , dosree taraf ko dekh."

"Abay daant bund kar warna bat-tee-see torh kay hath pay rakh doon ga"

So let the desi be desi. They can smile at goray and gorian but not at other desi.