This an easy and short one, but the documentation on WP.org for the load_plugin_textdomain function might lead you into the wrong direction, if you start thinking about how to define the 2nd and 3rd parameter.
For a simple plugin, it is best to use the translate.wordpress.org repository for translations. This way the different strings can be translated individually directly online and you do not need to worry about having the right
.mo files updated within your plugins repository.
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