Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello,
Open the start menu and search for the Microsoft office 2007 folder. Open the folder and the open the Microsoft office tools subfolder. From there select Microsoft office 2007 language preferences. A window will open with all the installed languages.
If you get an error massage like "If the Display Language tab is not displayed, you have only one Language Pack installed. For information about how to install another Language Pack, see Obtain and install a Language Pack." or only one language appears then you have to download a language pack.
Unfortunately support for office 2007 has ended and I couldn't find any official links for the language packs. However, I found this Office 2007 Language Packs Internet Archive and it seems safe to me but DO NOT DOWNLOAD IT UNLESS YOU ARE 100% SURE ABOUT IT.
Hope it helps