Previously unknown language losing some diversity (10)

I believe the answer is:

neologisms

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'previously unknown language losing some diversity' is the definition.
I can't tell whether this defines the answer.

'losing some diversity' is the wordplay.
'diversity' is an anagram indicator (a diverse or different spelling).
'losing'+'some'='losingsome'
'losingsome' anagrammed gives 'NEOLOGISMS'.

Can you help me to learn more?

(Another definition for neologisms that I've seen is " Modern bits of language".)

I've seen this clue in The Irish Times.

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