Dragon Heads in 1.9-pre2 (and earlier) have no translation strings (nor translation ids).
What I expected to happen was...:
'Dragon Head' is translated in other languages.
What actually happened was...:
'Dragon Head' is not translated in other languages.
Steps to Reproduce:
1. Take a dragon head
2. Switch locale
3. Compare
Thank you for your report.
However, your ticket has been resolved as invalid.
This ticket is a language translation request and is not supported on this bug tracker.
Please use the Crowdin Minecraft Translation Project for all translation change or add requests.