Play Framework - Remove empty form entries

I have a Play! 2.3 Form object that is being bound from the request. The Form object basically looks like this:

val languagesForm = Form(
    mapping(
      "languages" -> list(text)
    )(apply)(unapply)
)

I have some jQuery code that adds a new languages[1] to my HTML form but there will always be an empty input submitted which Play! includes as an entry. How do I remove these empty entries?