I don't think you want Rep[Int] here because this was already used to refer to strings like "123".  You need to introduce a new type, such as:
```scala
case class EnglishInt(get: String)
```
And then I think you have a Bijection[Int, EnglishInt]. I think that is the easiest thing to do here. I'm a little skeptical that the Tag/@@ approach is going to work well.