Plugin uses WordPress own Cron Scheduler.

Yes. On the plugin Settings page, you can enable use of such post types and taxonomies. But, this is not recommended or useful, since there is no hierarchy to navigate, plugin is designed for use with hierarchical post types and taxonomies.

Yes. Plugin can be activated as site wide or for individual websites only.

Yes. Plugin must be activated as site wide.

Yes. Each site in the network can activate and use the plugin.

Yes. POT file is provided as a base for translation in the root folder for each plugin. Translation files should go into languages directory, and WordPress must be set to your language to load the file. File name for translated and compiled MO file must be the same as POT file with addition of language code: {plugin-name}-{language-code}.mo.