<P> Some grammatical information relating to specific verbs in various languages can also be found in Wiktionary . </P> <P> Most natural languages, to different extents, have a number of irregular verbs . Artificial auxiliary languages usually have a single regular pattern for all verbs (as well as other parts of speech) as a matter of design, because inflectional irregularities are considered to increase the difficulty of learning and using a language . Other constructed languages, however, need not show such regularity, especially if they are designed to look similar to natural ones . </P>

Differences between regular and irregular verbs in spanish