Step 10 of the Voxforge Tutorial and Howto use a tree.hed script that contain "questions" are specific to the English language, and therefore will not work with other languages.
See also the HTK manual.
Theoretically, you should be able to automatically create questions using the CMU Robust Group Sphinx Tutorial. These would be in Sphinx format, but could be used as a starting point for the creation of HTK questions for a tree.hed script.
what are the questions are to be set to form tree.hed