By default, sliders have no scales at all. What you can add is the following:
1) You can add an image to be displayed as visual anchor above the scale. Of course, you can use any kind of labels on this image. And you can use images for the scales themselves, of course (that may also include images)
2) You can show a number next to the slider, and by using JavaScript, you can transform the position (which ranges from 1 to 101 by default) in whatever output you need.