Symphony.

Its currently impossible to recreate backend selectboxes in the forntend. You can hardcode the options, but how to generate them dynamically?

For example using language field you have a selectbox in the backend to choose a language, of the ones you selected in the section. I would like to do this on frontend.

You can use the DS to populate the used languages, but not the available (selected) languages.

Section Schemas provides this:

existing values for Taglist and Select Boxes (should work for other similar field types too)