Matukio v4.5.4
Joomla 3.3.3

It seems that not all language overrides are working for me - for example:

COM_MATUKIO_YOU_ARE_BOOKED_ON_THE_WAITING_LIST
COM_MATUKIO_PARTICIPANT_ASSURED

For these two I have to edit them in the main language file because using Joomla language override doesn't work. It does work for some other ones in Matukio though. Any ideas what the problem might be? I took a quick look at the code and it seems fine.