We are working with the TaxonomyPlugin. With ‘hippotaxonomy:locales’ we’ve configured the plugin to only use ‘en’ (English). In the editor view this only makes the ‘English’ dropdown available. However when e.g. Dutch editor adds a taxonomy. Also the ‘nl’ key is added and another side effect: this ‘nl’ key is not visible for non-Dutch editors.
I’m trying to figure out now if this is misconfiguration on our part or a bug in the plugin. I’ll keep looking, but maybe you have a quick solution to this issue.