Some do. Unreal Engine 4 has localization support built in: https://www.unrealengine.com/blog/creating-a-localization-ready-game-in-ue4-part-1-text https://www.

Some do. Unreal Engine 4 has localization support built in: https://www.unrealengine.com/blog/creating-a-localization-ready-game-in-ue4-part-1-text https://www.unrealengine.com/blog/creating-a-localization-re... And I suspect any game engine intended for text-heavy games would provide something. Ren'Py is one example. But I'm fairly sure that Unity doesn't.