Software UI String Localization Guide

Develop a software UI string localization guide:

Software Type: [DESKTOP/WEB_APP/SAAS/ENTERPRISE]
Development Framework: [FRAMEWORK]
Source Language: [SOURCE_LANGUAGE]
Target Languages: [TARGET_LANGUAGES]
String Count: [STRING_COUNT]
UI Complexity: [SIMPLE/MODERATE/COMPLEX]

Create a comprehensive guide covering:
1. String extraction and resource file formats
2. Context documentation requirements
3. Character limit specifications
4. Variable and placeholder handling
5. Hotkey and accelerator localization
6. Error message and notification standards
7. Tooltip and help text guidelines
8. Form label and field localization
9. Menu and navigation adaptation
10. Pluralization implementation
11. Gender and formality variations
12. Concatenation avoidance strategies
13. Screenshot and context tools
14. Testing and validation procedures
15. Continuous localization integration