Stained glass windows are decorative and pretty and have the added benefit of adding privacy. But they are expensive. A cost effective alternative is to use window films to create a similar look. There are traditional as well as more contemporary styles to choose from. You can get a 24 inch by 36 inch panel from Amazon for under $20. The thick film sticks to the window on the inside and the pattern repeats so you can cover any window size. Design Your Wall (https://www.designyourwall.com) also offers custom sizes.
The film gives you the opportunity to see whether you like the stained glass effect without huge outlay and it can be changed out any time. Try a frosted panel on your kitchen cabinet glass to let light through but keep the contents hidden.