Copy the extracted language files (usually .ba2 files) and paste them into the \Data folder inside your Starfield directory.
Starfield Language Pack-RUNE: A Complete Guide to Localizing Your Space Adventure Starfield Language Pack-RUNE
Starfield supports for its user interface (menus and subtitles), but full voice dubbing is only available for 5 of them : Copy the extracted language files (usually
Mastering the Starfield Language Pack-RUNE: Installation, Troubleshooting, and Audio Setup and Audio Setup