The link drops are inappropriate and someone will remove them with extreme predjudice.
In general - 4 urls from one 'client' are not all going to be listed.
By category (Topical) suggest ONE site that covers the majority of your clients activities to the category that encompasses the business/company activities (ie if they do 2 types of business, look for the category that covers both)
By geography (Regional) suggest ONE site that covers the majority of your clients activities to the category that the business is based in.
Since you state the sites are bilingual English/French, you can also suggest the same url to the World/Français part of the directory
Note that you should suggest the SAME url to all 4 categories, not language specific deeplinks, not product specific parts of the business, just the single site that is about the business. This is irrespective of whether you split the products/languages out to seperate domains, or have them as sub directories on the main domain, the root url is the one that should (in most circumstances) be the one that is listed in all the categories.
Chances are that each of te 4 potential categories will be edited by different editors at different times.
so just what is the average time period to get listed
How long is a piece of string? Some sites are listed before being suggested, some are never listed, the average is thus zero divided by infinity. There is no mathematical mean that you can use to guess at when something that is inherently unpredictable will happen.
I will have to answer to my client pretty soon about his DMOZ listing
If you have offered a service that you cannot control (getting a site listed in a certain timeframe), the client has a right to be angry, but you knew that when you took on the job. If you contracted to submit/suggest the site for inclusion (as opposed to get it listed), and have done so, then you are not responsible for the site not yet being reviewed. It wouldn't matter who suggested it, it just has to wait for someone to want to edit those categories.