The most common and most likely answer to this crossword clue is the 4 letter word LAPP
I've seen this crossword clue in Financial Times
L
A
P
P
More clues leading to the result LAPP
- Nomad’s extended round trip
- Drink picked up for Father Christmas, possibly?
- One’s used to the cold drink, did you say?
- Language lab’s earliest computer program
- European in China upset over pressure
- Scandinavian picked up drink
- European from Portugal, 21
- Scandinavian left mobile accessory
- Like Northern people as part of race, you might say
- Shock putting off a returning European
Buddy explains!

The straight part
We know that "Language" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case language = lapp.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.