This is a frequency list of Vietnamese words.

Every other frequency list currently available on the web was made by looking at groups of alphabetic characters split at \b, or "word boundaries", using the programming definition of a "word."

However, in Vietnamese, spaces denote not only word boundaries, but also syllable boundaries—and a significant proportion of the Vietnamese lexicon consists of polysyllabic words.

This data is based on:

• Leipzig Corpora Collection (1M mixed-source Vietnamese sentences).
  Source: Leipzig Wortschatz Project. Download: Leipzig Wortschatz

• OpenSubtitles2016 Vietnamese corpus, originally described in:
  Lison, P. & Tiedemann, J. (2016). OpenSubtitles2016: Extracting Large Parallel Corpora from Movie and TV Subtitles. Proceedings of LREC 2016.
  I used the cleaned and compiled version available here.

Before word frequencies were calculated, both corpora were first combined and tokenized using pyvi (GitHub), and then words were normalized to account for orthographic differences (tone mark placement in ambiguous cases, differences in capitalization, and the use of final i/y).