def usual_language_name(language):
    """Return the usual language name (one that may be found in _SCRIPT_EXTENSIONS above)"""
    language = language.lower()
    if language == 'r':
        return 'R'
    if language.startswith('c++'):
        return 'c++'
    if language == 'octave':
        return 'matlab'
    if language in ['cs', 'c#']:
        return 'csharp'
    if language in ['fs', 'f#']:
        return 'fsharp'
    return language
