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Language checking for scientific papers

This program attempts to assist you in improving your paper before submission.


  • Can analyse any LaTeX papers, and Overleaf projects.
  • Makes automated reports to point you to improvements:
    • Word level:
      • find common grammar mistakes, like wrong prepositions
      • find wordy phrases and suggest replacements
      • a vs an
      • spell-check (using hunspell)
    • Sentence level:
      • find long, wordy sentences
      • check topic sentences
    • Paragraph level:
      • find tense inconsistencies
    • Paper level:
      • check visual impression of paper
  • All analysis is done offline -- your text does not leave your computer.
  • Supports British and American English, but focusses on issues applying to both.

Note that there are false positives -- only you can decide whether a change would make sense, the reports only point out potential issues.

If you find some rules useless (too many false positives), or you want to add more, please send a pull request!

Demo output

Example analysis (of an early draft of this paper):


  • python
  • convert command (ImageMagick): Install with your distribution
  • nltk: Install with pip
  • nltk data: Install with python -m nltk.downloader all
  • detex command (usually comes with LaTeX)
  • pyhunspell (optional): Install with pip


These commands should not give you an error:

$ which convert
$ which python
$ which detex
$ which hunspell
$ ls /usr/share/hunspell/{en_US,en_UK}.{dic,aff}

Then install the python packages and data:

$ pip install pyhunspell  --user
$ pip install nltk  --user
$ python -m nltk.downloader cmudict stopwords punkt averaged_perceptron_tagger


Using directly:

  • create PDF from your latex file -> mypaper.pdf
    • For example, run "pdflatex mypaper.tex"
  • use detex to create pure text file -> mypaper.txt
    • For example, run "detex mypaper.tex > mypaper.txt". You need detex installed.
    • This does not capture figure captions. The script can help you include those texts, "bash mypaper.tex". You still need detex installed
  • run $ python mydir/mypaper.txt mydir/mypaper.pdf
  • open with a web browser mypaper_index.html to see all reports

Using with Overleaf:

$ bash <overleaf_url> <name of tex file>
# for example:
$ bash mypaper.tex

See also


Improve the language of your paper before submission




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