Switch language widget

Hi there!

I am about to build a new website that will be displayed both in Greek and English. This means that in each page, there should be a switch language option (e.g. two flags, en-el). I do not need a translating widget, I will do the translation myself. I just need a switch-language widget.

I have been searching in the widgets directory and I have come up with a lot of translating widgets and just one flags widget which adds flags only in the home page.

Can you help me find a widget that will add a switch-language option on top of every page?

Thank you