I did as was said, but it it didnt solve the problem.
I have to save somewere after I've changed the app language?
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You actually need to completely uninstall InDesign and then reinstall it (after you've select תומך עברית in the Creative Cloud app). It's two different versions of InDesign, so the CC app will download the correct version at that point.
Just as what Timonthy said, Find and install Hebrew or Arabic editions of InDesign CC or Illustrator CC
Please also clean your cache, and preferences before reinstalling. Troubleshooting 101: Replace, or "trash" your InDesign preferences