[BUG] Error: 'language' when use lightrag collection to index, and the book.txt is an English story

[Richardjjjj]

Description

Indexing [1/1]: book.txt => Converting book.txt to text => Converted book.txt to text => [book.txt] Processed 1 chunks => Finished indexing book.txt [GraphRAG] Creating index... This can take a long time. [GraphRAG] Indexed 0 / 1 documents. Error: 'language'

Reproduction steps

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

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![DESCRIPTION](LINK.png)

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