[OSM-dev] Translation of "Key of the map" and "mouse over texts"

[Mathieu Clément]

Hello,

First, I'm new to this list. I'll introduce me very quickly.
I'm coming from the french part of Switzerland (although the german one 
is very close), near Fribourg, and I began to help one year ago.
I regularly improve the map, but these times I saw I can help 
differently too.

I corrected some things in the french translation, and I saw it was 
incomplete.

My questions are :

  1.  I'd like to translate the "key of the map", but it's a "png" file.
     Is there a SVG version that I can edit,
     and then, where should I put it?
  2.  How can I translate the text showing up when mouse is kept on a
     link? (title=" ")


Regards,

Mathieu