Wow such a lot of replies!
Please follow this guide in order to get your Free AcyMailing license: https://docs.acymailing.com/setup/available-language/translate-acymailing
In short terms, translate AcyMailing, share the translation and we will give you a FREE AcyMailing Enterprise license.
The expiration date of the license will be decided based on the amount of strings you've translated (if your language file was already 90% translated then we won't be able to provide a lifetime license for example)
Can't wait to receive your translations!
Let us know!