Hi,
I get an error message in on of my Foxcontact modules: "Hebrew translation is still incomplete. Please consider to contribute by completing and sharing your own translation. Learn more"
How can I get rid of this message?

Volunteer to finish the translation of the Hebrew language file

Seriously though - if you look in your language file, <your path>/language/he-IL/he-IL.com_foxcontact.ini, you will see that while the first 152 lines have been translated into Hebrew, the rest haven't, they have been added since version 2.0 and are in English.
At line 188, COM_FOXCONTACT_PARTIAL=1, which indicates an incomplete translation.
Setting .._PARTIAL=0 should prevent that message. I'm unsure whether this would have any negative consequences, you could try it and see.

If you, or a colleague, are able to help with translating some or all of the remaining texts then Demis would be grateful. There is a how-to which details this.