Elisabeth, who teaches "real French" on her channel, emphasizes that politeness is paramount in France, where people can be easily offended in any setting. She specifically instructs learners never to use "Je veux" (I want) when addressing someone directly, as it sounds like an aggressive order. Instead, one should always use the conditional form, "Je voudrais" (I would like), which conveys a polite wish and allows the other person more choice. Elisabeth provides practical examples: in a café, one should say "I would like a Coke"; in a shoe store, "I would like to try on this model"; and in a meeting, "I would like to ask a question." Similarly, when asking someone to move or requesting a table for a group, "I/we would like to pass" or "we would like a table for six" are the polite forms. She also notes that in spoken French, "on" is often preferred over "nous" when referring to "we." Mastering the use of "Je voudrais" over "Je veux" is essential for polite communication in France.