first language: german (native speaker),
second language: english (learned at school and work)
third language: french (learned at school)
German Language & Usage
Q&A for speakers of German wanting to discuss the finer points of the language and translation
Stack Overflow
Q&A for professional and enthusiast programmers
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Physics
Q&A for active researchers, academics and students of physics
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Server Fault
Q&A for professional system and network administrators
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Raspberry Pi
Q&A for users and developers of hardware and software for Raspberry Pi
Musical Practice & Performance
Q&A for musicians, students, and enthusiasts
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
