Processor method parameter error messages are hard-coded. https://github.com/domaframework/doma-tools-for-intellij/commit/52a0e181f97650b090d74e490072b7bfcdb4d0d8#diff-f2be3e8219c8806ceaff289045b3ca80a6609611320999cb189834cfd3f8da29R46 Error messages are managed in a resource file.