As a language learner and teacher, I'm fairly well-versed in the subject. Learning a language is tough, especially at an older age, and anyone who's done so would be loath to criticise another learner. Studies have shown it's near impossible to become completely fluent in a foreign tongue if...
That kind of criticism usually comes from people that have never mastered a foreign language. Doing so, especially at his age, is no mean feat. Especially being expected to speak to the world's media.