COBOL isn't a domain specific language by the usual meaning. It was designed for business use cases rather than Fortran that was for math folks but both are fully general purpose languages[0].
A DSL is a language made up by you, the user, for a specific aspect of your business.
[0] Source: I worked on mainframe compiler development at IBM on both the COBOL and Fortran products.
COBOL isn't a domain specific language by the usual meaning. It was designed for business use cases rather than Fortran that was for math folks but both are fully general purpose languages[0].
A DSL is a language made up by you, the user, for a specific aspect of your business.
[0] Source: I worked on mainframe compiler development at IBM on both the COBOL and Fortran products.