Translation tool

I've a web application using php5. All languages files are written in php with "defined variables". I need a tool which allow translator to see references files and write translated files. So this translation tool will : - open reference files. It's zip file with several php files directory and sub directories. All directories must be parsed. - open translated files. It's zip file with several php files directory and sub directories. All directories must be parsed. It can use specials encoding like hebrew, russian, chinese, but english or italian too. Translated files can be empty or missing, so if we have this case, your apps must create or complete translated file. php language files can have some php instructions and not only defined variables. These instructions must be respected in translated files. Take care : translators aren't php coder, so your translation tool must hide all php data. When job is done, translator can export translated files to a zip file. Your translator apps must run on windows (mac and linux are optional). In your bid tell me : - which os can be used - programming language used (you'll have to send me all sources files and rights) - if an installer is needed - how do see GUI It's not an urgent job, you can use C, VB, Borland, php, as you want. I added an example of reference zip file and a partial translated zip file with specific encoding.