The UT names are just LUL. How can you research Lechitic Legacies? Most DE UTs are just civ name or whatever else the civ is meant to represent and a random word now.You know you have too many civs when you have to introduce such complicated names for units & techs. And when you have to introduce a "winged hussar" when hussars already have wings.
Cuman Mercenaries
Burgundian Vineyards
Flemish Revolution
Timurid Siegecraft
Lechitic Legacies
Hussite Reforms
The only other UT that was named alike before DE was Greek Fire and that was a real thing to be named like this.
By this pattern, some old Uts should be renamed:
Ironclad: German Steel
Furor Celtica: Irish Siegecraft
Stronghold: Scotish Architecture
Stirrups: Bulgar Saddles
Druzhina: Russian Guards