Danish unit translated into another tongue (10)
I believe the answer is:
hindustani
'another tongue' is the definition.
'hindustani' can be an answer for 'tongue' (Hindustani is a language). I am unsure of the 'another' bit.
'danish unit translated' is the wordplay.
'translated' is an anagram indicator.
'danish'+'unit'='danishunit'
'danishunit' anagrammed gives 'HINDUSTANI'.
'into' is the link.
(Other definitions for hindustani that I've seen before include "Indians" , "Language" , "Converting device" , "tongue" , "Dialect of Hindi" .)