Multi-Language Packs

[camdixon]

This is an awesome repo!

My issue is how do I compile say the Luma theme or a theme I have with multiple languages?

    luma: {
        area: 'frontend',
        name: 'Magento/luma',
        locale: [
            'en_AU',
            'en_US'
        ],
        files: [
            'css/styles-m',
            'css/styles-l'
        ],
        dsl: 'less'
    },

This was from dev/tools/grunt/configs/themes.js