Which language certificates are recognized in Germany?

Many applicants for naturalization find that their language certificates are not recognized by the naturalization authorities – especially if they do not come from well-known testing providers such as telc , the Goethe-Institut or ÖSD . They are often even required to take an additional test with these providers. For those affected, this not only means additional work, but also costs and delays on the path to citizenship . However, legally, such a blanket exclusion of other certificates is…