Not quite, Bob. It is a drop down menu with EN and EL as the only choices. If you click on EL it is all in Greek. If you click on EN the items on the menu bar, and on the drop down panels that appear when you select a menu item, change to English but the rest of the items on the home page stay in Greek. Also if you select an item in one of the drop down panels the page appears in Greek.
It is arguably better to use the Greek version in Google Chrome with "automatic translate to English" selected. That works for a lot of pages, although I can't guarantee it will work for everything. I have noticed that some Greek web pages that are obviously in Greek don't get recognised as Greek and so don't get translated. For example e-shop
translates but Kafkas