You will need a 25-character product key for activation.
If you installed a language pack, you can switch the UI to Greek via File > Options > Language (or Εργαλεία > Επιλογές ), then select Greek as the preferred language. MS Office 2007 Greek.iso
(e.g., is it a language pack or the full suite?) What OS are you installing on? (Windows 10, 11?) You will need a 25-character product key for activation
A 664 MB ISO ( MS.Office.Proofing.Tools.Greek.[2007].incl.SP1.N Pellas.iso ) containing essential spelling, grammar, and thesaurus tools. Installing the ISO File MS Office 2007 Greek.iso