Drupal Translation

Drupal 的 Translation 是類似 GNU Gettext 的做法
直接用特定函式把要 transalation 的字串包起來，然後用工具 (potx-cli.php) 把這些字串從 code  extract 成文字檔，再用一般的 text editor 去修改成 target language。

Translation template extractor (含 potx-cli.php)
http://drupal.org/project/potx
Command line extraction: Copy potx.inc and potx-cli.php to the directory you would like to generate translation templates for and run php potx-cli.php. The translation templates will get generated as separate files in the current directory. Use php potx-cli.php --help to get a list of command line options.