When I search google for "site:nabblecasinobingo.com" I see ~580 results. So your pages are still indexed.
When I search google for "nabble casino" your site is the first one.
Do you use google webmaster tools? It should give you more clues about that.
What I want is:
Topic pages to show Title and Meta Tags.
So far it is showing
when I share the Topic page - shows page title and No meta description
Please post an example link so that I can check. It should be displaying the meta tags.
About the drop in search results, this is what you have to do now:
1) Go to webmaster tools and click on Crawl > Fetch as Google.
2) Fetch the homepage
3) A new row will show up. Click on "Submit to index"
4) Select "Crawl this URL and its direct links" and click Go
This will bring your pages back to google's index.
I am planning of add 2 new languages for the site: nabblecasinobingo.com
Do you plan to have all these languages in the same forum at the same time? If yes, this is not so simple. Changing the language of the entire forum is easy (Options > Application > Change language), but having multiple languages at the same time is not easy (but it should be possible with NAML). How exactly do you want this to work?