diff --git a/content/docs/cli/contents.lr b/content/docs/cli/contents.lr
index 3ce8d62e..58cb58bb 100644
--- a/content/docs/cli/contents.lr
+++ b/content/docs/cli/contents.lr
@@ -24,6 +24,9 @@ to change the behavior.
   If this is not provided then the project is searched upwards from the
   current working directory until a folder is found with a single
   `.lektorproject` file in it.
+* `--language LANG`: admin interface language, defaults to `en`. Available
+  options are: `ca`, `de`, `en`, `es`, `fr`, `it`, `ja`, `ko`, `nl`, `pl`,
+  `pt`, `ru`, `zh`.
 * `--version`: if this is passed it prints out the version of Lektor and
   aborts further execution.
 * `--help`: prints out help about the command line interface.