it says i cant edit table in database
What exactly says that?
Editing is normally done in the frontend ui, you can delete any translation from there
The front end user interface, where you can edit all translations, just hit the edit translation link when you are an admin, or add tpedit=y to the end of your urls
I need edit things like site description
Open the translation interface anywhere, and use the next/back until you find it, you may also normally find things like description as a bunch of semi-transparent icons at the end of the html
