Vietnamese has no single word for you, and the correct depends on the .
Inside a family, the words come from rather than from age.
A father's younger brother and a mother's younger brother are called by different words.
Children learn this before they learn to read, simply by hearing it used.
Foreign learners find the system and to use.
A speaker must place every person in the room before speaking.
The system also carries information that English simply loses.
A translation can lose the difference between , relatives and strangers.
Young people in cities now use simpler forms with friends, and the older forms remain at home.
Nobody teaches this in a lesson, and everybody is corrected the first time they get it wrong.