This thread is resolved. Here is a description of the problem and solution.
Problem: At the moment my test environment is set up in English and in German. The basic language is German. Let's say a client orders something on the English site. After the ordering process she will receive a confirmation that the order has been received. Is it possible to translate this e-mail for the German client, so she or he receives the confirmation in German when the order has been made on the German site? Solution: You can translate the mail messages by going to Dashboard → WPMl → String Translation section. Basically, all the texts that you set to be send through emails are automatically added here so you can easily translate them.
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