Part of me was idly thinking about the modern idea of
Convention over configuration and idly wondering what some languages' anthropomorphic opinions on more important things than convention are...
Java: Yet more meaningless XML over convention.
C: Write it your self over convention.
Old-school LISP: vast sequence of hand-tooled, organisation-specific macros over convention.
C#: Microsoft's current convention over any community convention.
Machine code: the CPU is the convention!
BASIC: if you're writing stuff in BASIC that needs configuration, run away!
Python: the convention may not be obvious at first unless you're Dutch.