What are some unique features of the Icelandic language compared to other Nordic languages?
The Icelandic language is a North Germanic language, closely related to other Nordic languages such as Norwegian, Swedish, and Danish. However, there are some unique features of the Icelandic language that set it apart from the others:
1. Conservative grammar: Icelandic has a highly conservative grammar that has changed very little since the medieval period. This means that many Old Norse grammatical features, such as four cases, are still present in modern Icelandic.
2. Complex inflection: Icelandic is a highly inflected language, meaning that the endings of words change depending on their grammatical function. For example, the word barn (child) changes to barni in the dative case (to the child), and börn in the plural form (children).
3. Pronunciation: Icelandic has a unique system of vowel sounds, including sounds that are not found in other Nordic languages, such as the æ sound in maður (man) and the ö sound in fjöll (mountains). Icelandic also has a complex system of consonant clusters that can be difficult for non-native speakers to pronounce.
4. Vocabulary: Icelandic has a large vocabulary of words that are unique to the language and not found in other Nordic languages. This is due to Iceland's isolation and the need to create new words to describe local phenomena.
5. Literature: Icelandic has a rich literary tradition, with many important works written in the language. The medieval Icelandic sagas are considered some of the most important works of literature in the world, and Icelandic authors such as Halldór Laxness have won the Nobel Prize in Literature.
It is useful to know that.  Can you provide some comparative examples, along with explanations in English, with respective to each of your illustrated points between Icelandic and one of the other Nordic languages?
Certainly! Here are some comparative examples between Icelandic and Swedish, along with explanations in English:

**Conservative grammar:**
> Icelandic: Ég tala íslensku.
> Swedish: Jag talar isländska.
> English: I speak Icelandic.

In this example, both Icelandic and Swedish use the verb tala (speak), but Icelandic retains the dative case, which is reflected in the word íslensku (Icelandic). Swedish, on the other hand, has lost the dative case and uses the same form isländska for both the accusative and dative cases.

**Complex inflection:**
> Icelandic: Ég sá barnið.
> Swedish: Jag såg barnet.
> English: I saw the child.

In this example, both Icelandic and Swedish use the word barn (child), but Icelandic adds the definite article -ið to the end of the noun in the accusative case, resulting in barnið. Swedish, however, does not inflect the noun and uses the same form barnet for both the definite and indefinite cases.

**Pronunciation:**
> Icelandic: Hvað segirðu?
> Swedish: Vad säger du?
> English: What are you saying?

In this example, both Icelandic and Swedish use the phrase Hvað segir/ säger du? (What are you saying?). However, Icelandic has the unique vowel sound æ represented by hvað, while Swedish uses the more common vowel sound a represented by vad.

**Vocabulary:**
> Icelandic: Sólarhringur (sun circle)
> Swedish: Solvarv
> English: Solstice

In this example, Icelandic uses the compound word sólarhringur to describe the phenomenon of a solstice, combining sól (sun) and hringur (circle). Swedish, on the other hand, uses the word solvarv to refer to the same concept.

Please note that these examples are simplified and meant to illustrate the differences between Icelandic and Swedish in specific aspects. There may be further nuances and variations in actual usage.