330 lines
11 KiB
Markdown
330 lines
11 KiB
Markdown
# Language Detection and Enforcement - Implementation Complete
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## Problem
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The clarification quiz system was detecting the user's language (Indonesian, English, etc.) and asking questions in that language, but the actual article generation was producing **mixed language content**.
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**Example Issue:**
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- User writes: "pembahasan kenapa page builder itu diperlukan" (Indonesian)
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- Quiz questions appear in Indonesian ✓
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- User answers quiz in Indonesian ✓
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- **Generated article has mixed English/Indonesian** ✗
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- Phrases like "I'll write a detailed section..." appeared in English instead of Indonesian
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---
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## Root Cause
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The language detection in the clarity check was working correctly, but the detected language was **not being passed** to the article generation system:
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1. **Frontend**: Clarity check response included `detected_language` field, but it was never stored or used
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2. **Backend**: `/generate-plan` endpoint didn't accept language parameter
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3. **System Prompts**: Neither plan generation nor article writing had language enforcement instructions
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Result: AI defaulted to English or mixed languages because it wasn't explicitly told what language to use.
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---
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## Solution
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### Overview
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Implemented end-to-end language detection and enforcement across frontend and backend:
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1. **Frontend**: Capture and store `detected_language` from clarity check
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2. **API**: Pass `detectedLanguage` to `/generate-plan` endpoint
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3. **Backend**: Accept language parameter and enforce it in system prompts
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4. **Plan Generation**: Generate outline (title, headings) in detected language
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5. **Article Generation**: Write all content in detected language with explicit instructions
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---
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## Implementation Details
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### 1. Frontend Changes (assets/js/sidebar.js)
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**Added State Variable** (Line 49):
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```javascript
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const [ detectedLanguage, setDetectedLanguage ] = React.useState( 'english' );
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```
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**Capture Language from Clarity Check** (Lines 573-576):
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```javascript
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if ( clarityResponse.ok ) {
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const clarityData = await clarityResponse.json();
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const clarityResult = clarityData.result;
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// Store detected language for article generation
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if ( clarityResult.detected_language ) {
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setDetectedLanguage( clarityResult.detected_language );
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}
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// ... rest of clarity check handling
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}
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```
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**Pass Language to Article Generation** (Line 641):
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```javascript
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body: JSON.stringify( {
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topic: userMessage,
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context: '',
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postId: postId,
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answers: [],
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autoExecute: true,
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stream: true,
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articleLength: articleLength,
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detectedLanguage: detectedLanguage, // NEW
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} ),
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```
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---
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### 2. Backend Changes (includes/class-gutenberg-sidebar.php)
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**Accept Language Parameter** (Line 365):
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```php
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$detected_language = $params['detectedLanguage'] ?? 'english';
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```
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**Update Method Signature** (Line 484):
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```php
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private function stream_generate_plan( $topic, $context, $post_id, $auto_execute, $article_length = 'medium', $clarification_answers = array(), $detected_language = 'english' ) {
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```
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---
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### 3. Language Enforcement in Plan Generation (Lines 554-595)
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**Dynamic Language Instructions:**
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```php
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// Determine language instruction for plan generation
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$plan_language_instruction = 'You MUST generate the article plan (title, section headings, descriptions) in English.';
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if ( 'indonesian' === strtolower( $detected_language ) ) {
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$plan_language_instruction = 'You MUST generate the article plan (title, section headings, descriptions) in Indonesian (Bahasa Indonesia). All section headings and content descriptions must be in Indonesian.';
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} elseif ( 'spanish' === strtolower( $detected_language ) ) {
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$plan_language_instruction = 'You MUST generate the article plan (title, section headings, descriptions) in Spanish (Español). All section headings and content descriptions must be in Spanish.';
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} elseif ( 'french' === strtolower( $detected_language ) ) {
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$plan_language_instruction = 'You MUST generate the article plan (title, section headings, descriptions) in French (Français). All section headings and content descriptions must be in French.';
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}
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```
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**Updated System Prompt:**
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```php
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$system_prompt = "You are an expert content strategist and technical writer. Your task is to create a detailed article plan/outline based on the user's topic and context.
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CRITICAL LANGUAGE REQUIREMENT:
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{$plan_language_instruction}
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IMPORTANT CONSTRAINT: {$section_limit}
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...
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```
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---
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### 4. Language Enforcement in Article Generation (Lines 705-766)
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**Dynamic Language Instructions:**
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```php
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// Determine language instruction based on detected language
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$language_instruction = 'You MUST write the ENTIRE article in English. All content, conversational responses, and article text must be in English.';
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if ( 'indonesian' === strtolower( $detected_language ) ) {
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$language_instruction = 'You MUST write the ENTIRE article in Indonesian (Bahasa Indonesia). All content, conversational responses, and article text must be in Indonesian. Do NOT use English words or phrases unless they are technical terms that have no Indonesian equivalent.';
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} elseif ( 'spanish' === strtolower( $detected_language ) ) {
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$language_instruction = 'You MUST write the ENTIRE article in Spanish (Español). All content, conversational responses, and article text must be in Spanish.';
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} elseif ( 'french' === strtolower( $detected_language ) ) {
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$language_instruction = 'You MUST write the ENTIRE article in French (Français). All content, conversational responses, and article text must be in French.';
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}
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```
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**Updated System Prompt with Critical Language Rule:**
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```php
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$system_prompt = "You are an expert content writer and technical consultant. Your task is to provide helpful conversational feedback AND write the article content based on the provided plan.
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CRITICAL LANGUAGE REQUIREMENT:
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{$language_instruction}
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ARTICLE LENGTH CONSTRAINT: {$length_instruction}
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DEPTH GUIDELINE: {$depth_instruction[$article_length]}
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CRITICAL WRITING RULES:
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1. LANGUAGE: Strictly follow the language requirement above. This is NON-NEGOTIABLE.
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2. Section Count: Strictly follow the section count specified above
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3. Paragraph Quality: Each paragraph must be 4-6 sentences with substance
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...
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```
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---
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## Supported Languages
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Currently supports:
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- **English** (default)
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- **Indonesian** (Bahasa Indonesia) - Explicitly allows technical terms without Indonesian equivalents
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- **Spanish** (Español)
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- **French** (Français)
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Easy to extend by adding more `elseif` conditions for other languages.
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---
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## Examples
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### Example 1: Indonesian Prompt
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**User Input:**
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```
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pembahasan kenapa page builder itu diperlukan
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```
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**Clarity Check:**
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- Detects: `detected_language: "indonesian"`
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- Questions in Indonesian: "Platform apa yang ingin dibahas?"
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- User answers in Indonesian
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**Plan Generation:**
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- Title: "Mengapa Page Builder Diperlukan"
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- Section headings: "Pengantar", "Manfaat Utama", "Kesimpulan"
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**Article Generation:**
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- All content in pure Indonesian
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- Conversational messages in Indonesian: "Saya akan menulis panduan lengkap..."
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- NO mixed English phrases
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---
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### Example 2: English Prompt
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**User Input:**
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```
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why page builders are necessary
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```
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**Clarity Check:**
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- Detects: `detected_language: "english"`
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- Questions in English: "Which platform should we focus on?"
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- User answers in English
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**Plan Generation:**
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- Title: "Why Page Builders Are Necessary"
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- Section headings: "Introduction", "Key Benefits", "Conclusion"
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**Article Generation:**
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- All content in English
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- Conversational messages in English: "I'll write a comprehensive guide..."
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- Pure English throughout
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---
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## Technical Details
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### Language Detection Flow
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```
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1. User sends message (e.g., "pembahasan...")
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↓
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2. Frontend calls /check-clarity
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↓
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3. Backend AI detects language from user message
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→ Returns: { detected_language: "indonesian", questions: [...] }
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↓
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4. Frontend stores detectedLanguage in state
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↓
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5. User completes quiz (all in Indonesian)
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↓
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6. Frontend calls /generate-plan with detectedLanguage: "indonesian"
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↓
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7. Backend generates plan in Indonesian
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→ Title, headings in Indonesian
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↓
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8. Backend writes article in Indonesian
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→ All content, conversational responses in Indonesian
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↓
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9. Result: Pure Indonesian article
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```
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### Why It Works
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1. **Explicit Instructions**: System prompts now have "CRITICAL LANGUAGE REQUIREMENT" and "NON-NEGOTIABLE" language rules
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2. **Separate Phases**: Both plan generation AND article writing enforce language
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3. **Technical Terms Exception**: Indonesian allows English technical terms when no equivalent exists
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4. **Default Fallback**: Defaults to English if language not detected or unsupported
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---
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## Testing Checklist
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### Basic Functionality:
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- [ ] Indonesian prompt → Pure Indonesian article
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- [ ] English prompt → Pure English article
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- [ ] Spanish prompt → Pure Spanish article (if model supports)
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- [ ] French prompt → Pure French article (if model supports)
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### Quiz Integration:
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- [ ] Quiz questions appear in detected language
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- [ ] Quiz answers captured correctly
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- [ ] Generated plan uses detected language
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- [ ] Generated article uses detected language
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### Conversational Messages:
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- [ ] Progress messages in detected language
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- [ ] Completion message in detected language
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- [ ] NO "I'll write..." in English when language is Indonesian
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### Edge Cases:
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- [ ] Very short prompt in Indonesian
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- [ ] Mixed language prompt (Indonesian + English words)
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- [ ] Technical topic with English terms
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- [ ] Clarity check fails (falls back to English)
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---
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## Benefits
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✅ **Pure Language Output** - No more mixed English/Indonesian content
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✅ **Automatic Detection** - AI detects language from user prompt
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✅ **Consistent Experience** - Quiz, plan, and article all use same language
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✅ **Extensible** - Easy to add support for more languages
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✅ **Clear Instructions** - System prompts explicitly enforce language with "NON-NEGOTIABLE" rules
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✅ **Technical Terms Handling** - Indonesian allows unavoidable English technical terms
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---
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## Files Modified
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1. **assets/js/sidebar.js**
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- Added `detectedLanguage` state variable (line 49)
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- Capture language from clarity check (lines 573-576)
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- Pass language to backend (line 641)
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2. **includes/class-gutenberg-sidebar.php**
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- Accept `detectedLanguage` parameter (line 365)
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- Update method signature (line 484)
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- Add language enforcement to plan generation (lines 554-595)
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- Add language enforcement to article generation (lines 705-766)
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---
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## Future Enhancements
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### Possible Improvements:
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- **More Languages**: Add German, Portuguese, Japanese, Chinese, etc.
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- **Language Auto-Detection Fallback**: If AI returns unsupported language, detect from user prompt using regex/linguistic analysis
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- **Mixed Language Mode**: Allow users to specify bilingual content
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- **Language Preference Setting**: Let users set default language in settings
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- **Per-Section Language**: Allow different sections in different languages (e.g., technical docs)
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### Advanced Features:
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- **Language Style**: Formal vs. casual language within the same language
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- **Region-Specific**: British English vs. American English, European Portuguese vs. Brazilian Portuguese
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- **Language Switching**: Detect when user switches languages mid-conversation
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---
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**Implementation Date:** 2026-01-18
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**Status:** ✅ Complete and ready for testing
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**Next Step:** Test with Indonesian prompt "pembahasan kenapa page builder itu diperlukan" to verify pure Indonesian output.
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