# Python Multilingual BibTeX Generator

This Python script generates `multilingual_papers.bib` by filtering the original `anthology+abstracts.bib` file for multilingual NLP research papers.

## Features

- **Identical Logic**: Uses the same filtering logic as the JavaScript web application
- **Comprehensive Detection**: Detects multilingual papers using keywords and language names
- **LaTeX Cleaning**: Properly handles LaTeX commands and formatting
- **Statistics**: Provides detailed statistics about the filtering process
- **Safe Operation**: Checks for existing files and asks for confirmation before overwriting

## Requirements

- Python 3.6 or higher
- No external dependencies (uses only standard library)

## Usage

1. **Place your files**: Ensure `anthology+abstracts.bib` is in the same directory as the script
2. **Run the script**:
   ```bash
   python generate_multilingual_bib.py
   ```
3. **Follow prompts**: The script will ask for confirmation if `multilingual_papers.bib` already exists

## Output

The script will:
- Generate `multilingual_papers.bib` containing only multilingual papers
- Display statistics about the filtering process
- Show the top 10 most common keywords found

## Example Output

```
Reading anthology+abstracts.bib...
Parsing BibTeX entries...
Found 50000 total papers
Found 2500 multilingual papers
Generating BibTeX content...
Writing to multilingual_papers.bib...
Successfully generated multilingual_papers.bib with 2500 papers!

Statistics:
  Total papers processed: 50000
  Multilingual papers found: 2500
  Percentage multilingual: 5.0%

Top 10 keywords found:
  multilingual: 1200 papers
  chinese: 800 papers
  crosslingual: 600 papers
  hindi: 400 papers
  low-resource: 350 papers
  korean: 300 papers
  arabic: 250 papers
  japanese: 200 papers
  spanish: 180 papers
  french: 150 papers
```

## Filtering Criteria

The script uses the same criteria as the web application:

### Multilingual Keywords
- multilingual, crosslingual, multi-lingual, cross-lingual
- low-resource language, low resource language
- low-resource, low resource

### Language Names
- 100+ language names including: Hindi, Chinese, Korean, Arabic, Spanish, French, German, Japanese, etc.
- Regional language variations and dialects

## Customization

You can modify the filtering criteria by editing the constants at the top of the script:

```python
MULTILINGUAL_KEYWORDS = [
    'multilingual', 'crosslingual', 'multi lingual',
    # Add your custom keywords here
]

LANGUAGE_NAMES = [
    'afrikaans', 'albanian', 'amharic', 'arabic',
    # Add more language names here
]
```

## Error Handling

The script includes robust error handling:
- Checks for input file existence
- Handles malformed BibTeX entries gracefully
- Provides clear error messages
- Asks for confirmation before overwriting existing files

## Performance

- Efficient regex-based parsing
- Memory-efficient processing for large files
- Fast keyword matching using set operations

## Troubleshooting

### File Not Found
```
Error: anthology+abstracts.bib not found in current directory.
```
**Solution**: Ensure the input file is in the same directory as the script.

### No Papers Found
```
No multilingual papers found. Check your keywords and language lists.
```
**Solution**: Verify your BibTeX file contains papers with multilingual content, or adjust the keyword lists.

### Encoding Issues
If you encounter encoding errors, the script uses UTF-8 encoding. Ensure your BibTeX file is properly encoded.

## Comparison with JavaScript Version

This Python script produces identical results to the JavaScript web application:
- Same filtering logic
- Same LaTeX cleaning
- Same BibTeX output format
- Same keyword detection

The main advantage is that it can be run independently without a web browser and provides detailed statistics about the filtering process.