Grok says
In summary, German’s status as the leading language studied on Duolingo in Bulgaria, Serbia, Bosnia and Herzegovina, and Slovenia stems from a mix of historical German influence, economic migration to German-speaking countries, educational traditions, and the absence of local language courses on the platform. These factors make German a practical and culturally relevant choice for learners in these nations. If you’d like a deeper dive into any specific country or data source, let me know!
