Differentiating formal and informal language usage.

Become proficient with the processes of leveling and elevating, the two basic procedures for making linguistic expressions more or less polite.
Understand the difference between desu/masu form (polite/formal) and plain form (informal).
Recognise how verb endings, like the volitional form and the te-form used for making requests or giving commands, can denote the level of formality.

Familiarise yourself with the cultural concept of “uchi” (in-group) and “soto” (out-group) in Japanese society, as the language used can differ greatly based on the relationship between the speaker and the listener.
Explore examples of Japanese speech in different contexts, including casual conversations, formal meetings, and written communications.
Understand how the degree of formality can significantly influence the way thoughts and intentions are expressed in Japanese.

Engage in regular reading and listening practice using materials that incorporate both formal and informal language to acquire comprehensive language competency.
Utilise language learning apps and social media as resources for exposure to informal speech and colloquial Japanese. Also consult textbooks and academic materials for formal language usage.
Practice code-switching, the ability to alternate between formal and informal speech, as a key skill in Japanese communication.

Keep revising and practising to improve linguistic versatility. Ability to switch between formal and informal language can make communication more effective and nuanced.
Garner feedback from teachers, native speakers, or through language exchange programs to gain insight into accurate usage of formal and informal speech.
Track your advancement in understanding and using formal and informal Japanese - reviewing your progress often helps maintain motivation and focus.