Welcome to our forum and thanks for contacting us with your question!
You can change all the texts using lang, all the possible options are here: https://api.highcharts.com/highstock/lang
The ones that you are looking for are searchIndicators
. All the others for the popup will be here: https://api.highcharts.com/highstock/la ... tion.popup
I prepared a demo where I made the changes that you requested, see:
Demo: https://codepen.io/Jakub-Januchta/pen/E ... itors=1010
Let me know if that was what you were looking for!