I noticed that when you want to display the relation ship between 2 people it only displays one (the shortest) path. It might be nice to display multiple paths between 2 people. On http://www.geneanet.org they also do this or they atleast tell you there are multiple paths and let you choose which one to display.
I have the same problem in Spanish. My relatives don't speak English and don't understand the invitation. It appears that no matter the language used for invitations, allways it goes in English. MyHeritage don't still have a multiple language for this topic. I suggest to MyHeritage to make an easy adition in the program allowing users to write their own text on a simple window during the invitation process.