Hello,
the addition "internetnational" means that the enclosed documentation is in English, as is the user interface of the FRITZ!
The language of the user interface can be changed in the user interface, as described here, point 1:
https://avm.de/service...There are no functional differences between the internetnational version (article number 20003058) and the version for the German market (article number 20003043).
If you have any further questions, please do not hesitate to contact our technical support team by e-mail. Please send us the character string "#6692865" to the e-mail address: fritzhilft(at)avm(dot)de .
Kind regards from Berlin
Your AVM team