Build a Website

I've been away from Internet website projects for a quite a while, about 10 years, and now decided to give it a try again. This should be a simple website, which can be switched between two languages English/Russian, with text area editable by admin, just one button at the end of text area,user comments area which can be enabled or disabled, contact link, and ad space. The button lunches webform where a user can enter his or her email address and fill out the form. After submitting the form the user gets "thank you" message and confirmation sent to the user emai address, or error message to correct the form. This form populates the DB with inf submitted where email address is being treated as unique ID. From admin panel admin should be able to email selected user, add fields to webform which will also update the DB, be able to create additional webforms, and admin query form with ability to get inf from DB in any combination of query keywords. Please reply with info of script language is best to use, protection, ad placement (adwords or ...). More detailed info will be provided when required.