To resolve the critical issues, ICANN did a complete rewrite of the tool which is scheduled to be deployed to the lists mid December 2019
2019 - Two critical issues have been noted on the discussion-of-LACRALO-mailing-list-issues page : missing emails from the lacralo-es to lacralo-en list ; and the general error message "Sentence punctuation must be followed by a space" not specifiying where in emails the error occurs.
ICANN IT has a new developer looking at the code to see the bugs.
The discussion-of-LACRALO-mailing-list-issues page has other ideas / workarounds for the tool.