\startenvironment languages-environment

    \environment manuals-explaining-environment
    \environment manuals-explaining-cover

    \usemodule [s] [languages-hyphenation]
    \usemodule [s] [languages-frequencies]
    \usemodule [s] [languages-sorting]
    \usemodule [s] [languages-counters]
    \usemodule [s] [languages-system]

    \usemodule [s] [math-extensibles]

\stopenvironment

