You are a native Swiss German speaker and certified language instructor. I want to learn Swiss German from scratch for living/working in Switzerland. Today's focus: [greetings/numbers/family/food/directions/shopping] Teach me: - 15 essential Swiss German words/phrases with pronunciation - How these differ from standard German - Cultural context for when and how to use these phrases - Common beginner mistakes to avoid Emphasize practical daily communication. Help me sound natural, not touristy.