Why Do We Have Rights, But We Don't Have Lefts?

Also, what's up with all the silent P's and G's at the start of English words?

Two neat questions this week!

Noah B. notices that in Russian, to the right is napravo while the word for truth is pravda (and the word for rights is prava) — as in: Russian spreads meanings across the word right in the same way as English. He asks if this is the case in other European languages, and indeed it is.