Vn language
VN often identifies Vietnam in a country context. Vietnamese is the main national language associated with Vietnam, but a country abbreviation and a language identifier are different kinds of labels. Technical systems may use different codes for them.
Meaning and context
A website can use VN as a compact country or market label. A translation menu may instead spell out Vietnamese or use a language code. Check the field’s documentation before treating a country code as a universally valid language code.

Examples and usage
A shipping destination labeled VN concerns a country. A request for a Vietnamese translation concerns a language and audience. The document might also need regional vocabulary or a particular level of formality, which the country label alone does not provide.
What to check
Vietnam is multilingual, so nationality does not establish every individual’s language. If you are configuring software, follow its accepted identifiers. If you are communicating with a person, ask their preference rather than inferring it from a short location tag.
Explore more: Word meanings and writing guides