Everyone can still submit translations even if there is no translation team formed. There are two ways to do that—following the existing procedures, which is the preferred way, and sending it as plain text, which means more work for a limited group of volunteers (the Translation Managers) to convert the translation in .po format.
To make the work with PO files easier, team co-ordinators can write a team-specific guide for people who are not familiar with that format, like https://www.gnu.org/server/standards/translations/po-how-to.html.
|• Submitting as PO:|
|• Submitting as Plain Text:|