Forge_fdf generates weird characters in keys and values of the data I give it. Since it changes the keys, the output pdf forms aren't modified. When manually removing these characters, it works very well.  Characters as seen by notepad++ : 
Forge_fdf generates weird characters in keys and values of the data I give it.
Since it changes the keys, the output pdf forms aren't modified.
When manually removing these characters, it works very well.
Characters as seen by notepad++ :