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Eike Kettner
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website/site/content/docs/webapp/metadata.md
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@ -130,10 +130,28 @@ page](@/docs/webapp/customfields.md) for more information.
# Document Language
An important setting is the language of your documents. This helps OCR
and text analysis. You can select between English, German and French
currently. The language can also specified with each [upload
and text analysis. You can select between various languages. The
language can also specified with each [upload
request](@/docs/api/upload.md).
Go to the *Collective Settings* page and click *Document
Language*. This will set the lanugage for all your documents. It is
not (yet) possible to specify it when uploading.
The language has effects in several areas: text extraction, fulltext
search and text analysis. When extracting text from images, tesseract
(the external tool used for this) can yield better results if the
language is known. Also, solr (the fulltext search tool) can optimize
its index given the language, which results in better fulltext search
experience. The features of text analysis strongly depend on the
language. Docspell uses the [Stanford NLP
Library](https://nlp.stanford.edu/software/) for its great machine
learning algorithms. Some of them, like certain NLP features, are only
available for some languages – namely German, English and French. The
reason is that the required statistical models are not available for
other languages. However, docspell can still run other algorithms for
the other languages, like classification and custom rules based on the
address book.
More information about file processing and text analysis can be found
[here](@/docs/joex/file-processing.md#text-analysis).