This is largely an issue with the visualisations, but there may be some other residual problems that I've not encountered yet.
When enabling multiple language support, including the import of language tagged ontology labels, the following behaviours are exhibited:
1) Visualisations can show the wrong language label (e.g. "Miembro de la facultad" instead of "Faculty Member"
2) Visualisations "hang" when selecting a locale other than english.