Upvote:5
Mao Zedong never learned to speak standard Chinese (Putonghua, alias Mandarin); he could only speak Hunan dialect, which Chinese people in other provinces find incomprehensible. This did not prevent him from becoming China's absolute leader.
Upvote:18
Fortunately for Napoleon, not speaking French well was still very common in France in this period. In 1794, only one tenth of the population were fluent in French. The pre-Napoleonic revolutionary government made strides to rectify this by banning all non-Parisian French dialects for official business, but they didn't devote the resources to educate the people and ensure the language was spoken universally.