Community Questions or Ask A Question feature allows panel members to create a single-select survey or a poll within the community in-order to get responses from the panel members.

https://www.questionpro.com/help/communities/community-questions-settings.html

Can it be set up so that questions must first be approved by the administrator?

How can I delete responses to quick polls? (similar as deleting survey responses in the survey response viewer)

Is this part of the article still valid:

"What if my community is a multilingual community, so, do I need to create separate polls for each language?

Yes, if your community is a multilingual community, you would be required to create separate polls for each of the languages."

As there is the translation option?

When setting up a poll, “Send Push Notification” can be activated. This applies to a portal notification.

Under Send > Templates > System Notifications > an email template can be edited (Poll Invitation Email). Is the poll invitation email always sent when a new poll is entered? Or can I deactivate the sending of an email?