This interactive visualization combines a world map with a scatter plot to explore language endangerment and speaker numbers. A dropdown menu filters the data by country or global view. Map points and scatter plot marks are rendered as SVG circles, colored by endangerment level using a sequential ordinal scale. The scatter plot uses a logarithmic y-axis for speaker counts and supports brushing to highlight matches across both views. Built with D3 v6 and React, it uses `d3.geoAugust` for map projection and `d3.scaleBand`/`d3.scaleLog` for axes.