The main concept:
1. There should be 1 or 2 PR managers on the site (so managing advertisements). These people: should have decent English skills, big knowledge of TUS and should be clear with the upcoming updates.
2. They create a newsletter a few days before the updates actually take place or it might be any other time. When they are done, they save the English version. This is the part where the translators become important. Each of the translators get a notification of the newsletter and they have exactly one week's time to translate the texts into their own language.
They may only save ready texts. They save it, and it's ready to go.
3. When the deadline counter is at zero, the newsletters are sent automatically, no matter how many languages it got ready. Each user of the site gets it in his/her own language (when possible).
4. The first newsletter should be received by every single user of the site: those members who registered but don't pay attention to the site or maybe forgot about it will be reminded about it.
THIS is an example how it would look like.
Feel free to comment, suggest, hit the applaud button next to my karma.