Delete residual files and folders (optional).I will go through step by step on how to clean up files, folders and registry keys. You can use the Control Panel – Programs and Features option to uninstall your product, but there are still many residual files the uninstaller doesn’t clean up. Unpack the ZIP file then run the installer.I would like to show you how to perform a clean uninstall of Autodesk products in Windows.

Download Autodesk Content Service Multi-Lingual. Also, this hotfix is required after installing the language pack. If this happens, you need to install the Autodesk Content Service Language Pack hotfix to address this issue.

When the AutoCAD language pack has been installed, you may experience the Autodesk Content Explorer to fail or will fail to work. When the extraction is complete, click Install again to begin installing the AutoCAD language pack you have selected.

Once the desired language pack has been downloaded, double-click the downloaded file and then click Install to unpack the AutoCAD language pack files. Since you are using the Autodesk AutoCAD 2014 version, visit Autodesk AutoCAD 2014 Language Packs and download your desired language pack for your application. I guess you are running the Autodesk AutoCAD LT 2014 Language Pack for your Autodesk AutoCAD 2014 which is not compatible. There is Autodesk AutoCAD LT 2014 and there is the Autodesk AutoCAD 2014. There are different versions of AutoCAD 2014. I guess you are installing the wrong language pack for your Autodesk AutoCAD 2014. Autodesk AutoCAD 2014 Allied product is not found

Autodesk autocad 2015 failed to install