If you cannot find it in your Account portal, use the (installed with AutoCAD). Go to "My Tools" > "Language Packs" > Select 2023 > English.
When using AutoCAD 2023 with the English pack, you'll benefit from the version's unique features, such as the for smoother navigation and optimized GPU memory usage when working in DirectX 12 mode. Autocad 2023 English Language Pack