To facilitate the learning process and make sure students will end up speaking something most native Spanish speakers can understand, shouldn't a student be concerned with the actual dialect being taught? I have seen that a lot of times, Spanish dictionaries and instruction never say what dialect is being taught. Is there perhaps some kind of software that can analyze the words of Spanish materials to find out what the dialect is?
What dialect of Spanish has the least amount of words and idioms that are not common to other Spanish dialects? Is there a common dialect used on television? Where can one find a dictionary that is dialect specific for each word?