WPML language switcher

hello,

I manage a bilingual website french/russian

The way the switcher works is not appropriate for me : when one is on the french page, the flag displayed is “french” as well as its label (“francais)”

but I would like to display instead the “russian” flag on the french page its “Русский” label, so that users to click on, which would be more logical !

as a solution I tried to create a new jpeg with both french/russian flag on it, to tell it is a switch, but I do not find the way to import it : I do not see the “edit” WPML menu

any idea ?
thanks a lot !

The page I need help with: [log in to see the link]