In some of the citation templates on en-wikipedia some fields have a great many parameters. For example cite-book has
"last": { "label": "Last name", "description": "The surname of the author; don't wikilink, use 'authorlink'; can suffix with a numeral to add additional authors", "aliases": [ "last1", "author", "author1", "author1-last", "author-last", "surname1", "author-last1", "subject1", "surname", "author-last", "subject" ], "suggested": true, "type": "string" }, "work": { "label": "Work", "description": "Name of the work in which the cited book text is found", "type": "string", "aliases": [ "journal", "website", "newspaper", "magazine", "encyclopedia", "encyclopaedia", "dictionary", "mailinglist" ]
Problems occur when the documentation page is viewed. In https://en.wikipedia.org/wiki/Template:Cite_book/doc the width of the parameters column is very wide making the table overflow the page width. This problems as been raised at https://en.wikipedia.org/wiki/Help_talk:Citation_Style_1#Please_fix_the_Template:Cite_book.2Fdoc_for_us.3F
Here's a screenshot where the actual parameter name cannot even be seen while editing the TemplateData. Note the parameter between "Original year" and "Editor first name":
This might be cured with an appropriate bit of css.
A bigger problem is how these appear from within VisualEditor. We can see the list of aliases overflow the space in the citation dialog.