This example visualizes endangered languages of the world as a scattermapbox plot, with points colored by endangerment level (vulnerable through extinct) and tooltips showing language names and speaker counts. It loads data from a remote CSV using d3.csv, then constructs a Plotly chart with the `scattermapbox` trace type and a `groupby` transform for categorical styling. The layout uses a dark Carto map style, zoom controls, and custom background colors, all rendered through Plotly's `newPlot` API.