This example visualizes language use in India as an interactive pie chart, with counts shown in millions. The chart uses a d3.pie layout and d3.arc to generate SVG paths, with a color scale from d3.schemeCategory20c. Hovering over a slice triggers a tooltip that displays the language label, count, and percentage, calculating the percentage based on enabled data entries. The dataset is loaded from an external CSV URL, and the rendering includes SVG elements with animation support for smooth transitions.