Allow to turn off auto-translate on a per-language or per-article basis

[db0]

On some particularly difficult languages (Greek, German etc) the Google autotranslation seems to be doing more harm than good. However it can be useful in general.

It would be good if there was capability to avoid this. One option would be to allow the admin to turn off autotranslate functionality for specific languages (this would be done from the config panel)

The other option would be to allow the translator to switch off the autotranslation before editing, this could be for example an alternative "edit" checkbox which when checked will put the article into edit mode but retain the original language it was written in rather than the autotranslation.