Icelandic, when used as a noun, refers specifically to the language spoken in Iceland. I'm improving my Icelandic by reading Icelandic newspapers.
Pro Tip 2/3
Not Interchangeable
Don't confuse 'Icelandic' with 'Nordic'; 'Icelandic' is specific to Iceland, 'Nordic' refers to a broader region. Nordic countries include Iceland, but only one has the Icelandic language.
Pro Tip 3/3
Unique Vocabulary
Icelandic has some unique sounds and letters that are not found in English, which may be challenging. The Icelandic alphabet includes characters like 'Þ' (thorn) and 'Ð' (eth).