title_body: What are the benefits of inventing irregular verbs in one’s conlang?
upvoted_answer: Irregular verbs are naturalistic.
  
  For this reason, even an international auxiliary language, namely IALA Interlingua, has irregular verbs to match its Romance source languages (that are famous for their wealth of irregular verbs mostly directly inherited from Latin)
  
  Irregularities add flavour to your conlang.
  
  They make the conlang as a whole more interesting and create some esthetic effect. It also shows that the conlang designer has spent some more time to make Eir creation not too schematic.