The Finnish language is a Finnic language spoken mostly in Finland that descends from Proto-Finnic and in turn from Proto-Uralic. It is closely related to the Estonian language as well as less-spoken languages, such as Karelian and Veps, and is also distantly related to Hungarian. The history of the Finnish language can be divided into multiple eras. The earliest phase, Early Finnish (varhaissuomi), lasted from its separation from the other Finnic languages sometime around the end of the first millennium AD until 1540. Around this time, the first Finnish texts of note that survive were written, marking the start of the Old Literary Finnish (vanha kirjasuomi) period. This lasted until the early 19th century, when some time around 1810–1820, the development of the Finnish language entered a new phase called Early Modern Finnish (varhaisnykysuomi). This developed into Modern Finnish (nykysuomi) around the 1870s, by 1880 at the latest.
Origins
Finnish belongs to the Uralic language family and more specifically to the Finnic branch of this family. Thus, Finnish has developed from Proto-Finnic, which in turn has developed from Proto-Uralic. Neither Proto-Uralic nor Proto-Finnic was written down, and what is known of them has been derived through historical linguistics. This includes reconstructions, which are traditionally marked with an asterisk (*). Finnish is noted for its conservatism. Many of the features reconstructed to Proto-Uralic, such as an agglutinating morphology, vowel harmony, consonant gradation, invariably initial (primary) stress, and possessive suffixes, are still present in Finnish today. Among the Finnic features that are not found in the other Uralic languages are adjective–noun agreement, the analytic perfect and pluperfect tenses, and possibly the default word order being SVO instead of SOV, although the Finnic word order was likely flexible, as in Finnish today. Proto-Uralic was originally spoken east of the Ural Mountains, but after its dispersal not long before the 2nd millennium BC, Uralic languages had reached as far west as the upper reaches of the rivers Volga and Oka. Slightly after the beginning of the spread of Sámi languages (to southeastern Finland by around 1000 BC and to Central Scandinavia by 200 AD), the Finnic speakers then began to spread along the upper Oka, and the main group reached the northern and western coasts of Estonia around 800 BC. Shortly thereafter, they also reached southwestern and southern Finland. Development of Proto-Finnic into Late Proto-Finnic took place in Northern Estonia and spread across the gulf into southwestern and southern Finland in the Roman Iron Age, marking a second arrival into Finland. The speakers of the earlier Finnic varieties as well as the Sámi-speaking populations that had already settled the same area shifted their language to Late Proto-Finnic. Subsequently, Late Proto-Finnic continued its expansion north of the Gulf of Finland, along the Kokemäenjoki river valley, reaching Tavastia and then east to Karelia by the 8th century AD and Savonia between the 8th and 11th centuries AD. Upon reaching Karelia, Finnic unity began to break down. As they spread, the Finnic speakers assimilated the Sámi-speaking populations living inland, eventually leaving the Sámi languages in what was once their northwestern periphery. The breakup of the Finnic languages can also be studied linguistically. After South Estonian and Livonian branched off, the remaining core of the Finnic languages then split into Northern Finnic (including Finnish) and Central Finnic (including Estonian). Western Finnish (the western dialects of Finnish) represents a separate node in the tree under Northern Finnic. Eastern Finnish (the eastern dialects), also under Northern Finnic, is more closely related to Karelian and Ingrian; they share a common proto-language, known in literature as Proto-Karelian (muinaiskarjala). Therefore, Finnish has effectively developed from two different (albeit closely related) languages melding into one.
Among the sound and grammatical changes that can be noted from Late Proto-Finnic to North Proto-Finnic are (with Finnish reflexes):
*kt, *pt > *ht (*koktu > kohtu) the third-person singular verb ending *-pi (*anta-pi > dialectal antavi, modern standard antaa) *kc > *ks, *pc > *ps (*kakci > kaksi, *lapci > lapsi) *ck > *tk (*pucki > putki) *c > *s (*cika > sika, *keüci > köysi), except in *cc, *cr sporadic *ai > *ei (*haina > heinä, *raici > reisi) *ë (e.g. Estonian õ) > *e (*tërva > terva, *lainëh > laine) development of *ö in non-initial syllables under vowel harmony (*näko > näkö). Estimates put the number of Finnish words inherited from Proto-Uralic at around 300–400; despite their small number, they make up approximately 70–80 percent of average speech. Inherited words include nouns related to relatives, body parts, animals, and plants, along with many basic verbs and most of the pronouns.
Loanwords The oldest loanwords in Finnish were already present in Proto-Uralic, which borrowed words from Indo-Iranian languages. Proto-Finnic has many loanwords from the Baltic (over 250 words), Germanic (over 500) and Slavic languages (perhaps over 100). After Proto-Finnic, Finnish has borrowed extensively from Swedish, accounting for about a half of all loanwords in the language. Furthermore, many words were also borrowed from Middle Low German, even without Swedish mediation. More recently, English has become the most important source of new loanwords, as it has in the rest of the Western world. Loanwords in Finnish, both old and new, include:
In a 2018 article, linguist Kaisa Häkkinen estimated that out of the vocabulary present in a learner's dictionary, 49 percent of words were native, 46 percent were loanwords, and the remaining five percent had a disputed etymology. Out of the native vocabulary, 45 percent were older than Proto-Finnic, 52 percent were from the Proto-Finnic era, and the remaining 3 percent from after Proto-Finnic.
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