Can I create a node, assign a language and provide it a menu link with Drush?
Not out of the box. See this prior related question, all of these examples are created through the Devel 'generate content' library but they assume generic (ex. lipsum) content. For a custom build like you are asking with a specific title, you're best bet is going to be to create a custom Drush plugin using node_save to programmatically create a node with the values you want.