It's actually for *all* swords (including scimitars, katanas, two handed swords, short swords etc.) in BGEE (as it was in BG1 and BG2) and all bows apart from crossbows, I've tested this in-game and the Devs have confirmed.
If playing by PnP rules it should really only be for long and shortswords and bows.
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If playing by PnP rules it should really only be for long and shortswords and bows.