Hello Abdullah.
Do I understand it right that you're using Cloud DocSpace? https://www.onlyoffice.com/docspace.aspx

dear Constantine,
the issue is only in DocSpace

It my nitive language, and a language that have 442M people speak it as a nitive and non-nitive

Thanks for understanding

Please specify product that you are using, e.g. ONLYOFFICE Desktop Editors, Docs or DocSpace.
Also, please let me know that platform that is being used – Windows, Linux, etc.

this is the default square font that shown in start of spreadsheet Arabic version. it is difficult to use and unreadable.
The best font is Arial . i Suggest to make Arial the default font