I wish kimi ga waraeba, sekaijuu ga minna Happy nanda.
[ D: It's been a while, and I can read some more kanji than I could, but I'm still not nearly fluent enough to translate all of that. crying Oh well. If you post English next to your Japanese, it'll help me to learn more.
"だれも 日本語 を 勉強しています か。" Like this sentence. I got the most of it. "Who also (is) [verb]ing Japanese?" Is the verb speaking? Hanashiteimasu? ]
I wish that when you smile, for all the world to be happy.