(Does plot count as a bug?) Zarka calls the Sorceress 'jingakh' at the beginning of Act 3

Unlike with every other exile, the Maraketh don't address the Sorceress as 'jingakh' (they sometimes call her 'tale woman' though!), and at no other point do they refer to her as such.

...Until you take the caravan to Act 3 and talk to Zarka, in which case she uses the same generic 'jingakh' line as she gives to the rest of the exiles.

Is it a bug if it's just a minor plot detail...?

I'd call that a bug