These will likely be available as separate DLC or Steam depots on launch day. You can install them without re-downloading the whole game:
The Kingdom Come modding community is incredibly active. Post-launch, expect mods that allow for "Hybrid Language Packs" (e.g., Keep the ambient NPC chatter in Czech, but Henry speaks English). However, be warned: Language mods usually break after major patches. If you use unofficial language packs, disable auto-updates. Kingdom Come- Deliverance II -Language Packs-
Modern gaming faces a storage crisis. Kingdom Come: Deliverance II is expected to require between 80GB and 100GB of free space. High-fidelity voice acting takes up a massive amount of that data. A single language dub (with all the NPC variations, ambient chatter, and cinematic dialogue) can be between 8GB and 15GB. These will likely be available as separate DLC
If the game forced you to download all 7+ dubs, the install size would exceed 150GB. Consequently, Warhorse uses a modular system. You download the Core Game (Textures, Code, Music) plus your Selected Language Pack. However, be warned: Language mods usually break after