Hi Wendy,
Greetings.
Thank you for posting the query.
It is not possible to use a cross-site lookup field in a qChartView web part.
In qListView web part, we can change the properties of the display fields but in qChartView web part we cannot, hence that is the reason in qChartView web part it shows the actual contents of the cross-site lookup field, and not the “translated” contents.
Thanks
Deepak