Translation doesn’t work for the countries table

I use the Loco Translator to translate the plugin. I used the pot file and created the po and mo files. I translated the words, headers of the tables etc, but the countries list table headers are not translated. The [cec_corona country_code=TR flag=true] table is perfectly translated but the headers of the table which shows the datas of all countries are not showing the translated words, but showing English, even that I translated them. Why doesn’t the table headers don’t change even that they are already translated? Is this a bug?
Nice plugin by yhe way, thanks for the effort.