empty id in Japanese guide

[yamarten]

The id attribute of thehead removes Japanese, resulting in an empty id in some tranlated pages. There is no problem with headings that contain some English characters.

Here are some examples from the self-hosting page.

English	Japanese	id
Table of Contents	目次	""
Getting help	ヘルプの取得	""
Preparation for self-hosting PDS	セルフホスティングPDSの準備	"pds"
Verifying that your PDS is online and accessible	PDSがオンラインでアクセス可能であることを確認する	"pds-2"