Hello there,
Thanks for showing an interest in our plugin.
It will not work to have https://www.example.uk, https://www.example.ro, etc. This means directly a multiple domains sistem and, right now, we don’t have support for this.
It is a tracked feature requested also by other users, but for the moment, we don’t have a timeframe for it.
Thus the only approach using our plugin would be a multilingual website at the moment.
However TranslatePress works on multisite. You can either network activate the plugin, or do it individually for each sub-site.
You can add languages on individual sub-sites in a network install (and choose the languages in which you translate each sub-site).
Unfortunately, we do not support having each sub-site as a secondary language.
Let me know if you have any other questions.