It's important to know, there are 3 different Vietnamese dialects. In Vietnam, there are 3 different areas in which people speak their own "version" of the language: North, South, and the Middle. However, the northern dialect is considered standard and is the main language used by the media. Order of popularity in media is as follow: North, South, and Middle. The differences are not just in accent, they are also in the vocabularies. For example: northern people use "bố" for "dad/father", southern use "ba". Northern people say "cái bút" while southerners say "cây viết" to mean "a pen". Likewise, in the Middle, people say "mô" when they mean "where", while people from the North and those from the South say "đâu/ở đâu". Because of those variations, sometimes even native Vietnamese speakers have problems communicating with each other. For foreigners who just start to learn the language, this can cause a lot of confusions and even frustrations. The grammar is, however, the same for all three regions.