Once you have the ISO file, follow these steps:
Unlike modern Microsoft 365, where language settings are a cloud toggle, Office 2010 required a dedicated (LP) or Language Interface Pack (LIP). The full Arabic LP was a ~180–250 MB download that fundamentally altered the binary behavior of Word, Excel, PowerPoint, and Outlook.
Because Office 2010 is no longer actively supported, official direct download links for the base language packs are limited on Microsoft's main site , though some service packs remain available.