HI Daichi Miyuki,
This is very simple using css, just find the class name mx-name-radiobutton . check the below screenshots. call the parent class and within child class change the Label value and set it as !important. I hope it helps
Simplest solution is to use platform supported Radiobutton List widget https://marketplace.mendix.com/link/component/20
Hi Daichi! If your logic allow, you can crate an enumeration with two values. That will give you flexibility on what caption you would like to use.