The rsync box builds the manuals every night, at around 05:00 UTC. The web servers then pick up these builds when they sync, which usually happens every hour.
The docs development server builds the manual six times a day (every 4 hours, starting at midnight UTC). This takes place on the euk2 server. An easy way to see when each translation was last built, is to look at the doc downloads page with dates. Also note that several old translations reside on this particular server, as it attempts to build every translation (both active and inactive).
The CHM version of the manual is built on a Windows machine and pulled on Fridays, for distribution to web servers. Richard maintains these builds.
Aside from running
php configure.php –with-lang=foo (see editing)
for a language, another way to check if the docs validated is by looking at build
dates on the doc server. See "Doc server builds", above.
broken-language.txtfile in root of broken translations to disable those that are very outdated and failing to build for a long time.
If there is a problem with the synced builds, it's wise to contact Derick or Hannes. If a problem exists on the development server (docs.php.net), then contact Peter or the documentation team mailing list.