But because the direct evidence for Old High German consists solely of manuscripts produced in a few major ecclesiastical centres, there is no isogloss information of the sort on which modern dialect maps are based.
Pero debido a que a evidencia directa sobre o antigo alto alemán consiste soamente en manuscritos producidos nalgúns poucos importantes centros eclesiásticos, non hai información de isoglosas do tipo no que se basean os mapas dialectais modernos.