I added Language proficiency to my CPL while I was waiting for a couple of friends to pick up their 61.75 certificates and he was very efficient, friendly and knowledgeable.
You shouldn't have to do that if you have an FAA CPL. All you have to do is apply for a new ticket because by doing the CPL you must have passed a check ride with an examiner, and one of the pre-requisites of holding a CPL is being able to talk English! I just paid my $2 and did it online.....