First, I'd say even if you drop the four languages without replacing them, you still have nine languages to learn - that's a lot! Second, rather than suggesting random languages, I want to suggest a few questions you can ask yourself to help you decide which languages to choose. * Is there a particular region/continent that interests you more? A country/region where you hope to visit someday? If you have a definite regional interest, add more languages from there. For example, Asia: Japanese, Vietnamese, Taiwanese, etc. * Are you interested in languages with a writing system different than the Latin alphabet? (Writing systems are an interest of mine.) Greek, Arabic, and Russian all have different writing systems. * Are you interested in tonal languages? * Do you have any interest in historical languages, archaeology, religious studies? You could choose ancient Greek, Latin, etc. * Do you have friends or friends of friends whose first language isn't English? You could study that language. I used to have a friend from Poland. I never formally studied Polish but I learned some basic phrases and how to sing Sto Lat (the Happy Birthday song in Polish), thanks to her. Good luck!

Wow!!! So many languages I give you lots of respect... If you want a challenge, maybe give Japanese a try! There more than enough resources to learn about it.