Complex sentence: Swords designed specifically to be "tachi" are generally "kotō" rather than "shintō", so they are generally better manufactured and more elaborately decorated, however, these are still katana if worn in modern "buke-zukuri" style.
Split into simpler sentences: Swords designed specifically to be "tachi" are generally "kotō" rather than "shintō", so they are generally better manufactured and more elaborately decorated. However, these are still katana if worn in modern "buke-zukuri" style.