In the legal sense there is no "official" developer anymore. That was ATI. Since the community took over, the license was changed to MIT, meaning it's everybody's game at this point. I own the repo for the fork and I don't turn down PRs, so feel free to contribute.
The project is a direct fork of the original repo (Alan's), and there has never been a realistic effort in Armory to move the localized text to dedicated files. To get actual in app translations going, we would need that step taken care of first (hint hint).
knightdk will add a todo page to the site with a list of the most sought after contributions for people willing to help in other capacity that straight up code.
As for anything related to the site itself, either coordinate directly with knightdk or submit a PR to the gh-pages branch.