(Minority-) language as an economic factor for prosperity?

In Europe exist over 200 languages of which only 24 are official languages of the EU. What effect do have minority and regional languages onto prosperity? Is there any correlation between the language use and regional GDP per capita? How does affect the meaning of an own regional language the regional wealth? These questions have not been answered yet in the scientific literature. To answer them, data of the German Bundesländer, the Regions of France and Italy, the autonomous communities and cities of Spain, the British constituency countries and Cornwall, as well as Monaco, Andorra, Liechtenstein, San Marino, Greenland, the Faroe Islands, Åland, the Isle of Man, the Bailiwick of Guernsey, the Bailiwick of Jersey and Gibraltar This paper attempts to examine and fill a scientific gap on this topic by means of the comparison of economic data with results of adapted quantitative surveys. From 2019 and 2023, these surveys have been conducted in all mentioned regions. They are analysed by descriptive statistics. Correlation between regional language use and regional wealth, meaning of regional language use for the population and regional prosperity as well as the meaning of own unique culture for the regional population are calculated and interpreted. The paper concludes with a Conclusion, the bibliography and an annex.