Having a file with a bad title, is a very annoying and time-consuming problem for commons.
The current version of the upload tool, does not have any guidance. E.g.
Commons partially (but not perfectly by any means) solves this with small [?] tooltips. (Note: a click is required - they don't open on mouseover)
Re-Using and improving the same qqx messages, might be ideal, to avoid the need for near-duplicate sets of translations. (However, for file-titles, the new upload tool would need to truncate the file-extension)