diff --git a/guide/en.codepress.md b/guide/en.codepress.md
index 2c6fba4..f55081f 100644
--- a/guide/en.codepress.md
+++ b/guide/en.codepress.md
@@ -19,6 +19,7 @@ CodePress is a lightweight, file-based Content Management System built with PHP
 - PHP 8.4+
 - Web server (Apache/Nginx)
 - Modern web browser
+- Write permissions for content directory
 
 ### Installation
 1. Clone or download the CodePress files
@@ -56,20 +57,43 @@ content/
 ```
 
 ### Content Types
-CodePress supports three content types:
+CodePress supports four content types:
 
 #### Markdown (`.md`)
 ```markdown
 # Page Title
 
-This is the page content in **Markdown** format.
+This is page content in **Markdown** format with CommonMark extensions.
 
 ## Subsection
 
-- List item 1
-- List item 2
+- [x] Task list item
+- [ ] Another task
+- **Bold** and *italic* text
+- [Auto-linked pages](?page=another-page)
 ```
 
+#### PHP (`.php`)
+```php
+<?php
+$title = "Dynamic Page";
+?>
+<h1><?php echo htmlspecialchars($title); ?></h1>
+<p>This is dynamic content with PHP.</p>
+```
+
+#### HTML (`.html`)
+```html
+<h1>HTML Page</h1>
+<p>This is static HTML content.</p>
+```
+
+#### Directory Listings
+Directories automatically generate listings:
+- File information (size, dates)
+- Navigation to subdirectories
+- Responsive file listing layout
+
 #### PHP (`.php`)
 ```php
 <?php
@@ -88,6 +112,18 @@ $title = "Dynamic Page";
 ### Automatic Linking
 CodePress automatically creates links to other pages when you mention page names in your content.
 
+### Language Support
+- **Browser detection**: Automatic language detection
+- **URL switching**: `?lang=en` or `?lang=nl`
+- **Language prefixes**: `en.page.md` and `nl.page.md`
+- **Translation files**: `lang/en.php` and `lang/nl.php`
+
+### Search Functionality
+- **Full-text search**: Search through all content
+- **Search URL**: `?search=query` for bookmarkable searches
+- **Result highlighting**: Search terms highlighted in results
+- **File and content search**: Searches both filenames and content
+
 ---
 
 ## Templates {#templates}
@@ -102,37 +138,109 @@ CodePress uses Mustache-compatible templates:
 
 ### Template Variables
 Available variables in templates:
+
+#### **Site Info**
 - `{{site_title}}` - Website title
-- `{{page_title}}` - Current page title
-- `{{content}}` - Page content
+- `{{author_name}}` - Author name
+- `{{author_website}}` - Author website
+- `{{author_git}}` - Git repository link
+
+#### **Page Info**
+- `{{page_title}}` - Page title (filename without extension)
+- `{{content}}` - Page content (HTML)
+- `{{file_info}}` - File information (dates, size)
+- `{{is_homepage}}` - Boolean: is this the homepage?
+
+#### **Navigation**
 - `{{menu}}` - Navigation menu
 - `{{breadcrumb}}` - Breadcrumb navigation
+- `{{homepage}}` - Homepage link
+- `{{homepage_title}}` - Homepage title
+
+#### **Theme**
+- `{{header_color}}` - Header background color
+- `{{header_font_color}}` - Header text color
+- `{{navigation_color}}` - Navigation background color
+- `{{navigation_font_color}}` - Navigation text color
+
+#### **Language**
+- `{{current_lang}}` - Current language (en/nl)
+- `{{current_lang_upper}}` - Current language (EN/NL)
+- `{{available_langs}}` - Available languages
+- `{{t_*}}` - Translated strings (t_home, t_search, etc.)
+
+#### **SEO**
+- `{{seo_description}}` - Meta description
+- `{{seo_keywords}}` - Meta keywords
+
+#### **Features**
+- `{{has_content}}` - Boolean: is content available?
+- `{{show_site_link}}` - Boolean: show site link?
+- `{{is_guide_page}}` - Boolean: is this the guide page?
 
 ---
 
 ## Configuration {#configuration}
 
 ### Basic Settings
-Edit `engine/core/config.php` for your website:
+Edit `config.json` in your project root:
 
-```php
-$config = [
-    'site_title' => 'Your Website Name',
-    'default_page' => 'home',           // Default start page
-    'content_dir' => __DIR__ . '/../../content',
-    'templates_dir' => __DIR__ . '/../templates'
-];
+```json
+{
+    "site_title": "Your Website Name",
+    "content_dir": "content",
+    "templates_dir": "engine/templates",
+    "default_page": "auto",
+    "language": {
+        "default": "en",
+        "available": ["en", "nl"]
+    },
+    "theme": {
+        "header_color": "#0a369d",
+        "header_font_color": "#ffffff",
+        "navigation_color": "#2754b4",
+        "navigation_font_color": "#ffffff"
+    },
+    "author": {
+        "name": "Your Name",
+        "website": "https://yourwebsite.com",
+        "git": "https://github.com/youruser/codepress"
+    },
+    "seo": {
+        "description": "Your website description",
+        "keywords": "cms, php, content management"
+    },
+    "features": {
+        "auto_link_pages": true,
+        "search_enabled": true,
+        "breadcrumbs_enabled": true
+    }
+}
 ```
 
 ### SEO Friendly URLs
 CodePress automatically generates clean URLs:
-- `home.md` → `/home`
-- `blog/article.md` → `/blog/article`
+- `home.md` → `?page=home`
+- `blog/article.md` → `?page=blog/article`
+- `nl.page.md` → `?page=nl.page&lang=nl`
+
+### Language Support
+- **Browser detection**: Automatic language detection
+- **URL switching**: `?lang=en` or `?lang=nl`
+- **Language prefixes**: `en.page.md` and `nl.page.md`
+- **Directory precedence**: Directories take precedence over files
 
 ### Search Functionality
 The built-in search function searches through:
 - File names
 - Content of Markdown/PHP/HTML files
+- Search URL: `?search=query` for bookmarkable searches
+- Result highlighting and snippets
+
+### Directory Listings
+- **Auto-generation**: `?page=directory` shows directory contents
+- **File information**: Creation/modification dates and sizes
+- **Navigation**: Links to files and subdirectories
 
 ---
 
@@ -142,6 +250,15 @@ The built-in search function searches through:
 - Use subdirectories for categories
 - Give each directory an `index.md` for an overview page
 - Keep file names short and descriptive
+- Use language prefixes: `en.page.md` and `nl.page.md`
+- Directory names take precedence over files with same name
+
+### File Naming Conventions
+- **Lowercase names**: Use lowercase for all files
+- **No spaces**: Use hyphens (-) or underscores (_)
+- **Language prefixes**: `en.` or `nl.` for multilingual content
+- **Display names**: `file-name.md` displays as "File Name" in menus
+- **Special cases**: `phpinfo` → "phpinfo", `ict` → "ICT"
 
 ### Content Optimization
 - Use clear headings (H1, H2, H3)
diff --git a/guide/nl.codepress.md b/guide/nl.codepress.md
index eac5584..fac23f3 100644
--- a/guide/nl.codepress.md
+++ b/guide/nl.codepress.md
@@ -12,11 +12,15 @@ CodePress CMS is een lichtgewicht, file-based content management systeem gebouwd
 - **Home knop** met icoon die linkt naar de ingestelde homepage
 - **Automatische menu generatie** op basis van content structuur
 - **Responsive design** voor mobiele apparaten
+- **Breadcrumb navigatie** met home icoon en pad weergave
+- **Active state marking** voor huidige pagina in menu
 
 ### 📄 **Content Types**
-- **Markdown (.md)** - Met auto-linking tussen pagina's
+- **Markdown (.md)** - Met CommonMark ondersteuning en extensies (autolink, strikethrough, tables, task lists)
 - **PHP (.php)** - Voor dynamische content en functionaliteit
 - **HTML (.html)** - Voor statische HTML pagina's
+- **Directory listings** - Automatische generatie van directory overzichten
+- **Language-specific content** - `nl.` en `en.` prefix voor meertalige content
 - **Automatische template selectie** op basis van bestandstype
 
 ### 🔍 **Zoekfunctionaliteit**
@@ -24,13 +28,16 @@ CodePress CMS is een lichtgewicht, file-based content management systeem gebouwd
 - **Resultaten met snippets** en highlighting
 - **Directe navigatie** naar gevonden pagina's
 - **SEO-vriendelijke** zoekresultaten
+- **Search URL**: `?search=zoekterm` voor bookmarkable searches
 
 ### 🧭 **Configuratie**
 - **JSON configuratie** in project root (`config.json`)
 - **Dynamische homepage** instelling of automatische detectie
 - **SEO instellingen** (description, keywords)
 - **Author informatie** met links naar website en Git
-- **Thema configuratie** mogelijkheden
+- **Thema configuratie** met kleur instellingen
+- **Language settings** voor meertalige content
+- **Feature toggles** voor search, breadcrumbs, auto-linking
 
 ### 🎨 **Layout & Design**
 - **Flexbox layout** voor moderne, responsive structuur
@@ -39,6 +46,8 @@ CodePress CMS is een lichtgewicht, file-based content management systeem gebouwd
 - **Fixed footer** met file info en links
 - **Bootstrap 5** styling en componenten
 - **Custom CSS** voor specifieke styling
+- **Mustache templates** met conditionals en partials
+- **Semantic HTML5** structuur voor SEO
 
 ### 📱 **Responsive Features**
 - **Mobile-first** aanpak
@@ -46,6 +55,13 @@ CodePress CMS is een lichtgewicht, file-based content management systeem gebouwd
 - **Touch-friendly** dropdowns en navigatie
 - **Adaptieve breedtes** voor verschillende schermgroottes
 
+### 🌍 **Language Support**
+- **Browser language detection** op basis van Accept-Language header
+- **URL language switching**: `?lang=nl` of `?lang=en`
+- **Translation files**: `lang/nl.php` en `lang/en.php`
+- **Language prefixes**: `nl.bestand.md` en `en.bestand.md`
+- **Automatic language routing** voor meertalige content
+
 ## Installatie
 
 1. **Upload bestanden** naar webserver
@@ -64,6 +80,16 @@ CodePress CMS is een lichtgewicht, file-based content management systeem gebouwd
     "templates_dir": "engine/templates",
     "default_page": "auto",
     "homepage": "welkom",
+    "language": {
+        "default": "nl",
+        "available": ["nl", "en"]
+    },
+    "theme": {
+        "header_color": "#0a369d",
+        "header_font_color": "#ffffff",
+        "navigation_color": "#2754b4",
+        "navigation_font_color": "#ffffff"
+    },
     "author": {
         "name": "Edwin Noorlander",
         "website": "https://noorlander.info",
@@ -72,6 +98,11 @@ CodePress CMS is een lichtgewicht, file-based content management systeem gebouwd
     "seo": {
         "description": "CodePress CMS - Lightweight file-based content management system",
         "keywords": "cms, php, content management, file-based"
+    },
+    "features": {
+        "auto_link_pages": true,
+        "search_enabled": true,
+        "breadcrumbs_enabled": true
     }
 }
 ```
@@ -83,8 +114,12 @@ CodePress CMS is een lichtgewicht, file-based content management systeem gebouwd
 - **`templates_dir`** - Map met template bestanden
 - **`default_page`** - Standaard pagina (`"auto"` voor automatische detectie)
 - **`homepage`** - Specifieke homepage (`"auto"` voor automatische detectie)
+- **`language.default`** - Standaard taal
+- **`language.available`** - Beschikbare talen
+- **`theme.*`** - Kleur instellingen voor header en navigatie
 - **`author`** - Auteur informatie met links
 - **`seo`** - SEO instellingen
+- **`features.*`** - Feature toggles (search, breadcrumbs, auto-linking)
 
 ## Content Structuur
 
@@ -109,6 +144,9 @@ content/
 - **Geen spaties** - gebruik `-` of `_` als scheidingsteken
 - **Logische extensies** - `.md`, `.php`, `.html`
 - **Unieke namen** - geen duplicaten binnen dezelfde map
+- **Language prefixes** - `nl.bestand.md` en `en.bestand.md` voor meertalige content
+- **Display names** - `bestands-naam` wordt automatisch "Bestands Naam" in menu's
+- **Special cases** - `phpinfo` → "phpinfo", `ict` → "ICT"
 
 ## Templates
 
@@ -128,15 +166,70 @@ engine/templates/
 
 ### Template Variabelen
 
+#### **Site Info**
 - **`{{site_title}}`** - Website titel
-- **`{{page_title}}`** - Pagina titel
+- **`{{author_name}}`** - Auteur naam
+- **`{{author_website}}`** - Auteur website
+- **`{{author_git}}`** - Git repository link
+
+#### **Page Info**
+- **`{{page_title}}`** - Pagina titel (bestandsnaam zonder extensie)
 - **`{{content}}`** - Content (HTML)
+- **`{{file_info}}`** - Bestandsinformatie (datum, grootte)
+- **`{{is_homepage}}`** - Boolean: is dit de homepage?
+
+#### **Navigation**
 - **`{{menu}}`** - Navigatie menu
 - **`{{breadcrumb}}`** - Breadcrumb navigatie
-- **`{{search_query}}`** - Zoekopdracht
 - **`{{homepage}}`** - Homepage link
-- **`{{author_*}}`** - Auteur informatie
-- **`{{seo_*}}`** - SEO informatie
+- **`{{homepage_title}}`** - Homepage titel
+
+#### **Theme**
+- **`{{header_color}}`** - Header achtergrondkleur
+- **`{{header_font_color}}`** - Header tekstkleur
+- **`{{navigation_color}}`** - Navigatie achtergrondkleur
+- **`{{navigation_font_color}}`** - Navigatie tekstkleur
+
+#### **Language**
+- **`{{current_lang}}`** - Huidige taal (nl/en)
+- **`{{current_lang_upper}}`** - Huidige taal (NL/EN)
+- **`{{available_langs}}`** - Beschikbare talen
+- **`{{t_*}}`** - Vertaalde strings (t_home, t_search, etc.)
+
+#### **SEO**
+- **`{{seo_description}}`** - Meta description
+- **`{{seo_keywords}}`** - Meta keywords
+
+#### **Features**
+- **`{{has_content}}`** - Boolean: is er content beschikbaar?
+- **`{{show_site_link}}`** - Boolean: toon site link?
+- **`{{is_guide_page}}`** - Boolean: is dit de handleiding pagina?
+
+## URL Structuur
+
+### Basis URLs
+- **Home**: `/` of `?page=home`
+- **Pagina**: `?page=map/pagina`
+- **Zoeken**: `?search=zoekterm`
+- **Handleiding**: `?guide`
+- **Language**: `?lang=nl` of `?lang=en`
+
+### File Extensions
+Bestandsextensies worden automatisch gedetecteerd:
+- `pagina.md` → `?page=pagina`
+- `pagina.php` → `?page=pagina`
+- `pagina.html` → `?page=pagina`
+
+### Language Support
+- **Browser detection**: Automatische taal detectie
+- **URL switching**: `?page=nl.bestand&lang=nl`
+- **Language prefixes**: `nl.bestand.md` en `en.bestand.md`
+- **Directory precedence**: Directories hebben voorrang op bestanden
+
+### Directory Listings
+- **Auto-generation**: `?page=map` toont directory inhoud
+- **File info**: Creatie/modificatie datums en groottes
+- **Navigation**: Links naar bestanden en submappen
 
 ## SEO Optimalisatie