to use the file wp-content/languages/plugins/albdesign-wc-donations-uu_UU.mo in the plugin, it has to be declared like that :
load_plugin_textdomain("albdesign-wc-donations"); // search in wp-content/languages/plugins/
// search in the plugin files if not found in wp-content/languages/plugins/
load_plugin_textdomain("albdesign-wc-donations", FALSE, plugin_dir_path(__FILE__) . "languages/");
is it’s not the case, you can create another plugin to correct that loading of the translations files