[Plugin: ALO EasyMail Newsletter] where modify texts?

I’ve never tried, so the following may not be the correct advice!

I think you first need to download this PO file from here:
https://code.google.com/p/alo-easymail/downloads/detail?name=alo-easymail-de_DE.po&can=2&q=

Then follow instructions here: https://www.appthemes.com/blog/how-to-translate-a-wordpress-theme/ to edit the PO file, and create the MO file.

Then replace the MO file which is in the directory wp-content/plugins/alo-easymail/languages with your new MO file.

I have the same question and hope someone can give a clear advice before i destroy all the plugin files.

I would like to use the plugin for a vietnamese website. Ofcourse i can edit the texts in the plugin files itself, but i assume the plugin is multilangual?

Please, who can explain step by step how to add different languages to this plugin and selecting the correct one?

@h.a.visser, you can follow the 2nd link in dmgroom answer: there is a guide about translations.