I find a way to solve it. Look at my project
https://www.geni.com/projects/Obitelj-Isabegovi%25C4%2587-Family-Is...
First I make table for example in word, transfer/export table in jpg format and import in project as jpg.
For importing jpg you must "host" your picture on some server. Several are free. Importing picture into your project is describing path to your hosted picture place
That is a way of doing it offcourse, but for as being an image, no text can be traced. For many projects it would be a very useful solution if you could achieve this programming wise with the Wikicode. That would support more the idea of collaboration with other project members with the possibility to adjust some values of certain tables here and there.
But if you do not have any collaborators on your project, nothing is stopping you from using images instead :)