Only add a LOCALE_PATH for a plugin if the directory exists.
Only add a LOCALE_PATH for a plugin if the directory exists.

learningequality/kolibri,indirectlylit/kolibri,mrpau/kolibri,mrpau/kolibri,mrpau/kolibri,learningequality/kolibri,indirectlylit/kolibri,learningequality/kolibri,learningequality/kolibri,mrpau/kolibri,indirectlylit/kolibri,indirectlylit/kolibri