Which weapons are "treated as X". I mean, the Dueling Dagger has slightly different stats, but says "Any effects that apply to daggers apply to dueling daggers."
Does anyone happen to have a list of which all weapons can be treated as other weapons?
Kinda depends.
Do you want a list of weapons which can be treated as others only according to their own description or including feats/abilities?
Their are a lot of feats and class features, which allow a character to treat certain weapons as something else (albeit often only for specific aspects, e.g. Proficiency, weapon group, interaction with other feats/abilities).
Gladius are treated as short swords
Goldcape