I need to dublicate all existing routes with several language codes:

```
/2020/03/11/Hello-world
/en/2020/03/11/Hello-world
/de/2020/03/11/Hello-world

/Hello-world-page
/en/Hello-world-page
/de/Hello-world-page

/...
/en/...
/de/...

```

Then I need to pre-handle all routes to check prefix exists and get as slug, then let related handlers do thier jobs.. I searched it many many times but never lucky to solve..

How to accomplish that? Thank you!