I'd like to modify generated PDF file (invoice) in order to add extra predefined language string.
I added new line in language php file (e.g. define('_JSHOP_NEW_WORD','someword'); ) and add string (_JSHOP_NEW_WORD) in proper place in generate pdf php file, but it not works. Generated pdf show name of the string (e.g. _JSHOP_NEW_WORD) instead of its value (e.g. someword).
With strings which are already defined in language php file works fine. Looks like string is not pharsed for somehow.
Or I miss some other modification to do?