If you are unsure which pronoun to use, just drop it! In Thai, if the context is clear, omitting the subject is the most natural and safest way to speak.
Thai culture values social hierarchy, so we use different words to show respect.
No, use 'than' or 'rap-pra-than'.
Thai pronouns reflect the social relationship between speakers.
No, it sounds too formal with friends.
Generally, no. 'Chan' is mostly used by women in casual/polite speech or by men in songs and poetry. For daily life, men should use 'Phom'.
Usually, Thai people are forgiving to foreigners. However, using casual language with a superior might make you seem 'mai mee kalathesa' (lacking a sense of time and place).
