Your daugher should defintiely be in school. The question is what level she should be at. The risk you take in having her attend first grade is that she will not be able to keep up because of the language delay. At the kindergarten level this really isn't an issue. In other words, there's not much for her at this point to keep up with in kindergarten, and her language skills will improve. So, in either context her language is going to get better and better. But if she's in first grade it might be hard for her to keep up with the work as she strives to improve her language.