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I am writing a program that will take input from users in non-English languages (German, French, Spanish, Italian, and Portuguese) and will need to determine whether the input is grammatically correct. The majority of the coding will be done in Python, so I would like suggested tools to have a Python interface if possible.

I've found the Python NLTK which contains a grammar module. Their data includes English and Spanish grammars, but I am still in need of the other languages. Any help is greatly appreciated. Also, grammars for other languages are welcome, but the listed ones are the ones I will definitely need.

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    As far as I know, the NLTK grammars are Context-Free Grammars for parsing / generation rather than a module which checks grammar against some standard set of usage guidelines.
    – dmh
    Commented May 31, 2013 at 21:15

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A long time ago, LanguageTool used to be usable with just OpenOffice. These days, they have a stand-alone version too. In contrast to NLTK, LanguageTool is made (and extended) with Java. I suppose you could use Jython.

AbiWord also has a grammar checking tool that is built using Link Grammar. This was made with C.

Both tools support many languages.

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  • Thanks for the help! LanguageTool seems to be exactly what I need. They've got an embedded server that I can set up and just send requests to since my code will be running as part of a web page.
    – Alison Kao
    Commented Jun 3, 2013 at 21:26
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You may want to have a look at OpenNLP http://opennlp.apache.org/. It's in JAVA but it does have a parsing component. It is supposed to be available across languages but you may have to train it. Frankly, I haven't used it for anything myself so would be interested in hearing whether it is useful for an application like yours.

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  • I took a quick look at OpenNLP, and while it seems pretty cool, I just need a simple way to check the grammar. Thank you for the help though.
    – Alison Kao
    Commented Jun 3, 2013 at 21:27

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