"The curse that turned Lord Soth into a Death Knight also affected others in his household. His thirteen knights were transformed into mindless skeletons under Soth's command." -
via Mistipedia. The source is Knight of the Black Rose.
While it is true that they are skeletal warriors, it is possible that they are cursed to mindlessness by the gods. I don't have a position on it either way. I just want to know the competing lore. When
Black Roses Bloom has them as intelligent. I don't recall any novel, including Dragonlance, in which any of the thirteen skeletal warriors were able to communicate or think in the traditional manner. I could be wrong, however.
EDIT: ChatGPT was able to send me in the direction of the 3.5e
Dragons of Spring module where I was able to find a statblock.
Lord Soth’s Skeletal Warrior CR 10
Male civilized human skeletal warrior fighter 9
NE Medium undead (augmented humanoid)
Init +6;
Senses darkvision 60 ft, Listen +1, Spot +1
Languages Common, Ogre, Solamnic
AC 21, touch 11, flat-footed 20
hp 79 (9 HD);
DR 5/bludgeoning
Immune cold, electricity, polymorph; undead traits
SR 22
Fort +6,
Ref +5,
Will +4
Speed 20 ft. (mwk full plate); base 30 ft.
Melee +1 frost greatsword +16/+11 (2d6+9/17-20 plus 1d6 cold)
or
Melee touch +13 (1d6+4)
Base Atk +9;
Grp +13
Attack Options Cleave, Combat Reflexes, Mounted Combat, Power Attack
Abilities Str 19, Dex 15, Con —, Int 12, Wis 12, Cha 14
Feats Animal AffinityB, Combat Reflexes, Cleave, Greater Weapon Focus (greatsword), Improved Critical (greatsword)B, Improved Initiative, Mounted Combat, Power AttackB, Weapon Focus (greatsword) B, Weapon Specialization (greatsword) B
Skills Handle Animal +16, Intimidate +14, Knowledge (nobility) +4, Ride +18
Possessions mwk full plate armor, +1 frost greatsword, mwk daggers (2)
I guess that is case closed.