The Frisian language is the closest to English and Scots but has some significant differences that are worth mentioning here. First of all, Frisian phonetic structure contains 26 diphthongs and 6 triphthongs, though the number of vowels is the same as in English and they are all short. Vowels can be nasalized before n + consonant, and that is really uncommon among Germanic tongues. The consonants p, t, k must be aspirated before vowels; that happens also in English, but Frisian aspiration is much stronger. r is not uvular, as in Dutch and Germanic, and not palatal as in English, but normal as in Russian or Latvian.
Frisian morphology is more complex than English or Dutch. Frisian has
two noun cases, two numbers, two genders: masculine and feminine came into
one common gender opposed to neuter. The plural number of nouns has endings
-s and -en. The cases are common and genitive,
but genitive is different from common only in one-syllable words. The possessive
constructions are fromed mainly with the preposition fan
(Dutch van, German von), or by the possessive
pronouns. There are three different articles: indefinite in
(only in singular), definite for common case nouns de, definite
for neuter nouns it. The verb has conjugation in singular.
Verb tenses include all Germanic ones, there are indicative and imperative
moods, while subjunctive is expressed by analytical constructions.