Hello.
I have the same problem for french translation : we have many suggestion but nobody to approve and in last updates of phplist, language is not updated.
As you can read here Switching the phpList translation system from Pootle to Weblate we don’t have rights to approve or change translation, we can only make suggestions.
I think it’s a problem to really help phplist and really be part of community.
That’s my point of view. We’re moving on.
Best regards.