How many letters does the top answer for “language spoken in luxembourg” have?

The most common answer is french (6 letters).

Crossword clue: language spoken in luxembourg

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

french 6 letters wd-fact-v3

of or pertaining to France or the people of France

luxembourgish 13 letters wd-fact-v3

language spoken in afghanistan 50% similar → afshardialect, judeopersian, karakalpak

language spoken in afrighids 50% similar → khwarezmian

language spoken in albania 50% similar → aromanian, bulgarian, macedonian

language spoken in algeria 50% similar → algeriansaharanarabic, arabic, french

language spoken in andorra 50% similar → catalan, french, spanish

language spoken in angola 50% similar → khwe, lunda, luvale

language spoken in argentina 50% similar → puelche, spanish, tehuelche

language spoken in armenia 50% similar → assyrianneoaramaic