Hello,
Welcome to our forum and thanks for contacting us with your question!
Yes, it is possible. You can use
drilldown.breadcrumbs.format property or
drilldown.bradcrumbs.formatter() callback function to modify or change the text of these buttons.
Demo:
https://jsfiddle.net/BlackLabel/zuf0grxn/
API:
https://api.highcharts.com/highcharts/d ... mbs.format
https://api.highcharts.com/highcharts/d ... .formatter
Let me know if you have any further questions!
Best regards!