This add ([(int)$ct->id_lang]) makes a bug, the from name in the mail recepted by the customer is not the full name, but only the third letter! (realy insane...)
For example : Webmaster = b
or Service client = r

Look at this image :
![image](https://f.cloud.github.com/assets/1072425/1262799/045e418e-2c44-11e3-94ba-e809e10f7508.png)

prestashop 1.5.5.0 (lang fr & en)