@ J0k3r;
Willkommen; I agree with your taste in games.
You may write in any language you prefer. English (IMO) is the most common and most universally understood. I think almost any language to English and the translators do a good job; I also think most are wanting when translating from English to any other language.
The Priv-box contains 2 games. A joint venture between shark and Free-Strip-Games.Com and the latest release by shark, at this time "The Jungle Call". There are always a few additional scenes that were trimmed from the final release (5 currently). There is no schedule for release of any new shark adventure. Most take about 1.5 to 3 months between releases. You can have an impact on the dates, if you develop a story line that piques his interest it usually happens fairly quickly thereafter. Shark creates these at his leisure and there is no pressure that might keep him from other interests. "The Jungle Call' will be released to everyone once a new game is complete.
I hope I've answered all your questions, and hope to see you freely use the warm Lagoon waters. Perhaps we'll meet within the shade of a tall palm tree.
Lou