Translation request: Updating available language pairs

[sabinehunsicker]

When creating a new translation request, it would be useful to restrict the available languages. I.e. currently I could submit a request for Urdu to Welsh to the Lucy worker, although I know that this worker does not support these languages.

So when one specific worker is chosen, the set of available languages should be updated to those supported by that particular worker. (Alternatively, the set of workers could also be updated when choosing a source language, i.e. if a user wants to translate from French and they select this, they will be able to see which workers support this source language.)

[cfedermann]

One of the harder tasks, as AJAX would be required. Is on the list of future extensions ;)