Overriding the default 'Drag Components here' text in parsys component

Hi All,

I am trying to override the defaut 'Drag Component here' text in parsys/responsive grid component. I was able to achieve this by changing the few lines of javascript code in /libs/cq/gui/components/authoring/editors/clientlibs/core/js/model/Inspectable.js directly. Since i should not modify the foundation code from libs, i tried to copy the clientlibrary from /libs/cq/gui/components/authoring/editors/clientlibs/core to /apps/cq/gui/components/authoring/editors/clientlibs/core, my page is breaking with lots of JS Console errors. Can anyone suggest me a way to overwrite the foundation JS? I am using AEM 6.3.