I was on Khorasani’s English website, and it says that Namaz e Istighaasa should be performed for Hazrat e Zahra (as). Isn’t that worshipping a human and isn’t that considered shirk – or is there a problem with the translation.

All what we are doing in the form of ibadat is only for Allah s.w.t. When we ask for help from Masumeen a.s. it does not mean that they do these things for us by themselves, rather its the power blessed on them to perform these actions or we pray to Allah through their tawasul as Allah s.w.t. blesses those prayers which have tawasul of Ahl e Bait a.s