When sorting search results alphabetically, umlauts are sorted after latin1 characters: X,Y,Z then x,y,z then Ä,Ö then ä,ö. Umlauts should be sorted according to language specific rules. German requires different sorting from Swedish, for example.

Steps to reproduce

• Apply the fix for #15423 and reindex
• Create objects starting with latin1 characters and umlauts
• Search for them, while sorting alphabetically: {set $search=fetch( ezfind, search, hash( query, $search_text, sort_by, hash( name, asc ) ) )}