Small news for everyone:
Some days ago I have set up the WebLate platform which a system to work with translations. That means, everyone can contribute translations for PGE components easily and with less effort!
Here is a profile of PGE Project on WebLate: https://hosted.weblate.org/projects/pge-project/
To start work on translation, log in into WebLate (or register an account if needed) and feel free to translate! You can work together with friends and other folks on the same language to make the work go faster and easier rather than doing everything alone!