i tried all this ( including the repair procedure) and several versions of language pocks.
i didn't have any 2013 installed ( cleaned everything perfectly before installing 2016) .
it's a standard massage foe 2013 and 2016.
you can see it says:
"APPLIES TO: Excel 2016 , Word 2016 , Outlook 2016 , PowerPoint 2016 , OneNote 2016 , "
to my opinion it's a shame that Microsoft publish several versions of installation and does not make them compatible one with each other.

anyway i switched to office 2013 32 bit and that was the only version that gave me to install the language pack.
thanks for trying to help.