Nearly all thought processes deal in abstract concepts directly without being wrapped in language. Language is a transport mechanism for sharing these abstract concepts from one one brain to another, not for processing in the mind.
The idea that there is a "mother tongue" of your thoughts is a common misconception. You can consciously think about speech and language, but it's an exception to how your brain usually operates.
The idea that there is a "mother tongue" of your thoughts is a common misconception. You can consciously think about speech and language, but it's an exception to how your brain usually operates.