The CM there made a phone call to see if any French speaking CMs were available. The twelve year old age limit is a guideline. Some older children have used this service depending on the maturity level of the child. Lost Children has been used to help adults with developmental impairments, such as Down's Syndrome, also. For lost adults, City Hall has a message book.
Adults can leave messages there for others to try to reunite.
Disneyland will not page people in the park except for rare cases of extreme emergency. The CMs who have worked at the LC over time have noticed patterns which complicate lost children situations . During these times, children are more likely to look up to follow their adults, but they find a sea of giants and at times get disoriented and lost. Adults can hamper efforts by not asking for help. They may not realize that Disney has such an efficient system in place.