Here ia an English summary (not translation) of what she said:
The earlier, the better saying could not be more true here. Brains are like sponges the first few years of a child’s life. After that, it has been shown that the plasticity/ flexibility of brain starts to decrease. The longer a young child does not have access to quality sound, the more difficult it becomes to make sense of the many sounds provided by a cochlear implant. So telling a parent to wait until the child grows up to make the decision if s/he wants a CI is not a valid recommendation.
Research shows that if the auditory areas of the brain are not stimulated at a young age, then the window of opportunity to develop spoken language will be significantly decreased. Research does not give an exact age, however research and observation are suggesting that children implanted before age 2 are more readily developing spoken language than children implanted after that age.
Going back to the saying of earlier is better. The same holds true for American Sign Language. Research is showing that the brain has the capacity to learn both a visual and an auditory language at the same time. And when children are young they can learn several languages effortlessly. It’s so easy for them!
For us adults, we struggle to pass HS classes in foreign languages and college classes in French, Spanish, and so on. Then at the end of the semester we can only remember a few Spanish words. Why is that?
Two reasons: 1) when we get older, we can only “learn” (not acquire) additional languages – which means we have to be taught, it’s harder to learn languages naturally like children. 2) our brains harden as we get older, so teaching our brains new things are harder than it is for children.
So this principle makes sense, we want to expose our infants/children to as many languages as possible – ASL and spoken/print English for the case of American deaf children. It doesn’t have to be an either/or choice of ASL or a cochlear implant. You can't lose if you're bilingual from birth. You win, and you win the best of both worlds - the Deaf world and the Hearing world.
