Hi Liza,
Thank you for working on these. It looks like you were using a slightly outdated .pot file, so there were a few strings missing. I updated your translation with the latest .pot file so that all the new and changed strings would be there. You can download that file here. It would be great if you could translate those strings and send the file back to me.
Also, if you would like the files to be added to our plugins or you would like to receive a free license, please note that you’ll also need to translate Events Calendar PRO. It’s important that we have both of those plugins translated together. You can find the latest .pot files for PRO in our Getting Started post.
Best,
Leah