Since the markers in react-simple-maps can contain any SVG, you can use a library like Victory to render any other charts onto the map.
This map shows the language distribution in Switzerland. Switzerland has four official languages: German, French, Italian, and Romansh. German is the most widely spoken language by around 63% of the population, French by 23%, and Italian by 8%. Romansh is spoken by less than 1% of the total population. Source
* The boundaries and the designations used on this map do not imply the expression of any opinion on the part of the react-simple-maps team or z creative labs and are used for illustrative purposes only. The boundaries and shapes are not part of the react-simple-maps library and are sourced from Natural Earth and gadm.org.