Is it possible and efficient to add tooltips to the column headers on the table? Then the information in the above draft would go onto the tooltip. Or we could have shorter explanations in the tooltip, as long as there is a link on the page to a longer explanation somewhere else.
There was an issue with a long tooltip message on Welsh Wikipedia, reported on 15 October 2008. The problem happened using Firefox version 22.214.171.124 and using Linux. Here is a link to a screenshot of the message ("Preview your changes. Please use this before publishing.") being truncated.
I wouldn't have raised the issue if you hadn't asked. There is now a Welsh version of the latest Firefox version 3.whatever, so I agree that the particular issue above is probably irrelevant. However, the Welsh version of Firefox wasn't always the most up-to-date; the latest Welsh version used to lag quite a way behind the latest English releases, a situation which I assume applied to other languages as well.
Anyway, if we assume that a tooltip can be of any length, then is it possible and efficient to add tooltips to the column headers?
Yeah, can be done. Please make a proposal for the texts; they cannot contain links or HTML entities. If possible, they shouldn't be translatewiki.net centric, but generic.