A logged-in Weblate user can suggest translations, even though they can't just decide to accept them.
This should also be the case for Glossary terms: Logged-in users should be able to suggest certain terms be added to the Glossary, for the relevant language's translation team to consider.
I think it's a ticket for our infra Redmine
(In reply to Roman Kuznetsov from comment #1)
> I think it's a ticket for our infra Redmine
> Ilmari, Sophie?
Yes. Eyal: see https://redmine.documentfoundation.org/
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You can close this as resolved moved after creating it in Redmine.
Use category Weblate
Just filed: https://redmine.documentfoundation.org/issues/3478