An irregular verb is a verbal lexeme whose inflected forms are not fully derived by the language’s default productive rules of verbal inflection and must therefore be specified, at least in part, in the lexicon or represented through non-default morphological patterns ^[1][2]. Its irregularity may involve stem alternation, exceptional affixation, or suppletive forms, and may affect one or more cells of the verb’s inflectional paradigm, such as tense, aspect, mood, person, or number ^[1]. Unlike a regular verb, whose paradigm is predictably generated by applying general inflectional rules to a stable stem, an irregular verb displays form–function correspondences that are exceptional, lexically restricted, or organized into limited morphological classes rather than following the fully productive default pattern ^[1][2].