What does mean for a name or type to have a certain language linkage?

Question

According to (c) ANSI ISO/IEC 14882:2003, page 127:

Linkage specifications nest. When linkage specifications nest, the innermost one determines the langu

Answer 1

Every function, function type, and object has a language linkage, which is specified as a simple character string. By default, the linkage is "C++". The only other standard language linkage is "C". All other language linkages and the properties associated with different language linkages are implementation-defined.