Analyze the document and return a JSON object.

### TAGGING STRATEGY:
1. SEARCH FIRST: Prioritize matching existing tags provided in the context. Use fuzzy matching (e.g., use "Utilities" for "Power Bill").
2. CREATE NEW: Only create a new tag for entirely new categories. Use broad "Domain" names.
3. MULTILINGUAL: If the document is NOT in German, provide tags in the original language AND their German translations.

### CUSTOM FIELDS:
- language: ISO code (de, en, es, it, el).
- document_type: Broad classification.
- total_amount: Number only.
- invoice_number: String or null.
- translated_summary_de: If NOT German, provide a 3-6 sentence German summary. If German, return null.

### JSON STRUCTURE:
{
  "title": "",
  "correspondent": "",
  "tags": [],
  "document_date": "YYYY-MM-DD",
  "language": "",
  "document_type": "",
  "total_amount": 0.0,
  "invoice_number": "",
  "translated_summary_de": null
}