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[GH-ISSUE #82] Critical RTL/Persian Support Issue - 80M+ Users Affected #61
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deepseek-ai/DeepSeek-LLM#61
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Originally created by @sanginabadim on GitHub (Dec 23, 2025).
Original GitHub issue: https://github.com/deepseek-ai/DeepSeek-LLM/issues/82
Technical Issue Report: Persian RTL Text Rendering
PROBLEM SUMMARY
DeepSeek has severe Right-to-Left (RTL) text display issues for Persian/Farsi language, making the product nearly unusable for Persian-speaking users.
TECHNICAL DETAILS
Core Issue:
Text displays left-aligned (LTR) instead of right-aligned (RTL)
Incorrect character ordering in mixed Persian-English text
Broken hierarchical structures (lists, tables, code blocks)
Misplaced emojis and punctuation
Test Cases Showing Failure:
"این یک متن فارسی است" → Displays left-aligned ❌
"Hello دنیا" → Shows as "Hello دنیا" instead of "دنیا Hello" ❌
Numbered lists show incorrect alignment ❌
Emojis appear at wrong positions ❌
User Base Affected:
80+ million Persian speakers (Iran, Afghanistan, Tajikistan, diaspora)
Major Middle East market opportunity at risk
Business Consequences:
Users migrating to competitors (ChatGPT has proper RTL support)
Negative reviews spreading in Persian tech communities
Lost market share in high-growth region
Ask DeepSeek any question in Persian
Observe text alignment - starts from left instead of right
Test mixed Persian-English content
Check list and table formatting
Persian text should display right-aligned (RTL direction)
Mixed content should handle proper bidirectional text
Structures should maintain correct alignment
Emojis should position based on context
Immediate (1-2 weeks):
Implement direction: rtl and text-align: right for Persian text
Fix basic tokenizer for language detection
Apply CSS fixes for text alignment
Short-term (1 month):
Redesign Persian tokenizer
Retrain model on proper RTL data
Implement hierarchical structure support
Long-term (3 months):
Architectural changes for multilingual RTL support
Dedicated Persian language team
Comprehensive testing framework
USER FEEDBACK EXCERPTS
"We love DeepSeek but cannot use it with broken Persian display"
"ChatGPT shows Persian correctly - why can't DeepSeek?"
"80 million Persian speakers waiting for a fix"
CONTACT FOR FOLLOW-UP
[Your email/contact info here]
Available for testing and feedback on fixes
ADDITIONAL NOTES
This is a business-critical issue affecting user retention
Persian market represents significant growth opportunity
Quick resolution will prevent further user migration
Attachments:
Screenshots of RTL issues available upon request
Detailed technical analysis available
This issue requires immediate attention from your engineering team.
The Persian-speaking community is actively discussing this problem, and users are migrating to competitors daily.
Please provide:
Acknowledgement of this issue
Timeline for fixes
Point of contact for updates
Thank you for your urgent attention to this critical matter.
sanginabadim
Concerned Persian-speaking User