On the other hand, I found some languages of Release Notes are shown unpublished.
Except the following languages, I guess it related to commit eba29117d1780b7256f4511c2e9e1820da45ddd5, the commit only change these languages.
-rw-r--r-- en-US/Desktop.xml
-rw-r--r-- fr-FR/Desktop.po
-rw-r--r-- it-IT/Desktop.po
-rw-r--r-- ja-JP/Desktop.po
-rw-r--r-- nl-NL/Desktop.po
-rw-r--r-- uk-UA/Desktop.po