Note When you install Windows RT 8.1 Preview, all the language packs that you installed are removed. Only the base language is preserved. This is an expected behavior.
Update informationAn update (2865138) is available to resolve this issue. This update is installed when you upgrade to Windows RT 8.1 Preview.
Note If this issue already occurs, upgrade to the release version of Windows RT 8.1 when it becomes available.
Article ID: 2865138 - Last Review: Jul 4, 2013 - Revision: 1