Update the translation manual

Author: xie-dongping

TRANSLATION.md

@@ -398,5 +398,13 @@ using `pip` (*e.g.,* `pip install sphinx-intl`).
 % make dirhtml_<X>
 ```
 
-Currently supported languages are: `cn`, `es`, `fr` and `de` (*e.g.,* `make html_es`)
+Currently supported languages are: `cn`, `es`, `fr` and `de` (*e.g.,* `make dirhtml_es`)
+
+### Run the Python HTTP server in language <X>
+
+```
+% make server_<X>
+```
+Currently supported languages are: `cn`, `es`, `fr` and `de` (*e.g.,* `make server_es`)
+