Switzerland is a strong example of a country where one national storefront can still contain several meaningful language groups. The goal is not to split everything automatically, but to decide when German, French, and Italian each need enough storefront depth to justify explicit coverage.
Switzerland often requires more deliberate language planning because German, French, and Italian all matter in different commercial contexts.
The challenge is not only translation quality, but deciding how much storefront, SEO, and trust coverage each language should receive.
Each added language layer improves fit for part of the market, but also raises maintenance cost across products, SEO, and support content.