Translations of Poedit are managed here.
You can translate the main translation PO file directly in Poedit with its Crowdin integration (even offline). There are a few .strings files that cannot be translated in Poedit yet, these must be translated online.
Please also consider translation the WinSparkle updater (used on Windows) at https://crowdin.com/project/winsparkle
In case your language is not in the list yet, please let me know
(Note: This is not a support forum, please use support page
(Note 2: This project doesn't use proofreading. "Not approved" is nothing bad, it's an artefact of Crowdin forcing 2-step proofreading workflow down our throats.)