In these sections, we see the morphological modifications applying to LIS nominal signs to convey nominal plural marking. In general, manual inflectional processes are displayed by nouns articulated in the signing space, whereas invariable nouns can convey plurality by means of numerals, quantifiers or classifiers, or through specific non-manual markers occurring simultaneously to their articulation. However, we will see that there are some exceptions affecting some nouns of both the inflectional and invariable class.