I generated a sitemap.html ([external links are visible to admins only]) and I have a lot of entries with '.... gef' . They should be '... gefördert durch'. The stop the entry at the sign 'ö'. An example is [external links are visible to admins only] . There is a complete, right title.
In the configuration / advanced settings I have UTF8 (my homepage is UTF8), custom accept-language http:-header "de;at".