They can be referred to as either claws or nails, I think. I often always see them labeled as 'claws' in most places.
Not all people carry this knowledge of wolf anatomy with them. Unretractable claws are blunt claws, their only use is to allow them better purchase upon the ground when in pursuit of prey; however, they also use their dew claws to bring down smaller animals e.g. rabbits, hares, voles and to burrow dens.
Source was found
here.Some people probably just don't know, don't care, or prefer to role-play in a more unrealistic manner. I see some people use the excuse that: 'they have a 'mutation'; or just have 'really long claws that can't wear down/sharpen them on trees'? lol.