A "Full" language pack typically includes both localized text (menus, subtitles, UI) and full audio/voiceovers for all supported languages.
To get started, search Nexus Mods for "Rune Transliterator" and "Full Dialogue Interface." Combine them, and you will have the definitive experience. Just remember: Once you install it, you will never be able to play vanilla again. You’ll see the runes everywhere—even in real life. starfield language packrune full