Mmmmmm... mixing Russian with Portuguese seems difficult!!!
I speak Catalan, English and Spanish (in this order), French language being my next target. Although a Catalan can partially understand a text written in French, the pronunciation of your language seems to me an important challenge! I've been working in Italy for a while and I understand the Italian pretty well. There's a lot of similarities between the Spanish, Italian and Catalan, and a lot of common words (the same happens with the Portuguese). It's usual that a word that has become an archaism in one language is an usual word in the other.