Ummm. Many common day to day languages don't use lambdas. Also I have no idea what they are. So - yeah I don't think you can just replace if so easily.
Lambas are actually supported in most popular languages: C++, Java, C#, Go, JavaScript, even C. Sometimes they're called function literals or anonymous functions, but basically they involve creating a function without a name that can be passed around and executed. In some languages (Haskell, OCaml, etc) the anonymous functions can be extremely generic, whereas they are sometimes a bit less flexible in other languages. If you want a quick intro you can find one here: http://stackoverflow.com/questions/16501/what-is-a-lambda-fu...