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Icelandic
Language Identity
Icelandic, when used as a noun, refers specifically to the language spoken in Iceland. 
Not Interchangeable
Don't confuse 'Icelandic' with 'Nordic'; 'Icelandic' is specific to Iceland, 'Nordic' refers to a broader region. 
Unique Vocabulary
Icelandic has some unique sounds and letters that are not found in English, which may be challenging. 