[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

Screenshots

![DESCRIPTION](LINK.png)

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