Language translated by Belgian (7)
I believe the answer is:
bengali
'language' is the definition.
(I've seen this before)
'translated by belgian' is the wordplay.
'belgian' anagrams to 'BENGALI'.
Though, I'm unsure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for bengali that I've seen before include "foreign language" , "Asian language" , "East Indian" , "Indic language" , "may be Indian" .)