Per language character validation

It would be a great addition to I2Localization to provide a per language custom keyboard validation that mimics the Unity validation options (Alphanumeric, etc) for that set language and a configurable spreadsheet key for allowable or disallowed characters per language similar to the custom font per lanaguage.

For instance, we have a input field and want to allow alpha numeric, but Unity default is only A-Z, a-z and 0-9 and does not include accented characters like in German and certainly doesn't allow Russian or Japanese. To let them through we have to allow all characters, including emojis and symbols that may break things.