Inspired by this question:
Do the claw weapons created by Girallon's Blessing (Spell Compendium, p. 106) count as natural weapons? Are these claw weapons eligible to benefit from, say, a +1 Necklace of Natural Weapons (Savage Species, p. 56) crafted to provide the +1 enhancement to four natural weapons?
While the spell mentions "a creature" being unable to use normal weapons and the claw attacks in the same round, it does not mention these claws mixing with natural weapons - can these attacks be utilized in the full attack chain of a creature which already had natural weapons prior to being subject to this spell? Can these claw attacks be deployed as part of a Flurry of Blows (PHB, p. 40)?
Presumably, the last line of the spell means to limit the subject from mixing "normal" and natural attacks, which would be sensible and digestible... however, it could also seem like the spell is trying to remind readers of a general rule. Many spells do this, to provide helpful information for the game players regarding what is usual - see, for example, Blink [PHB, p. 206] and its helpful refresher on being ethereal. Except, in this case, if what the spell is saying were to remind players of a general rule, it would be incorrect. Natural weapons and Manufactured weapons can be used together, as shown here. Further, the usage of the term "normal" in this sense seems problematic, when the game typically uses the term manufactured to refer to non-natural weapons that are wielded in combat. How monks fit in this mess might best be its own question.
While this question comes close to asking the title's question, and while an answer to this question can probably be assisted by the answer there, this question is concerned with how the claws created by Girallon's Blessing interact with the rules governing natural weapons and natural attacks... if, indeed, they even are natural weapons at all.