Question: Why are Swedish dialects in Scania influenced by Danish?
About the article "Sweden", section "Language".

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South Swedish dialects (Swedish: "") is one of the main dialect groups of Swedish.
It includes the closely related dialects spoken in the formerly Danish but since 1658 Swedish traditional provinces of Scania (see Scanian dialects), Blekinge and Halland, as well as in the southern parts of Småland, which are the remains of an old dialect continuum between Danish and Swedish. 
Spoken in the Swedish province of Scania ("Skåne" in Swedish), the Scanian dialect is considered by some to be a dialect of Danish[http://www.ethnologue.com/show_language.asp?code=scy], and a related dialect is also spoken in Bornholm, where it is called "East Danish" (Scania was part of the kingdom of Denmark until 1658).
The variety generally spoken today is heavily influenced by standard Swedish. 
According to a traditional division of Swedish dialects, there are six main groups of dialects:  Norrland dialects  Finland Swedish  Svealand dialects  Gotland dialects  Götaland dialects  South Swedish dialects The traditional definition of a Swedish dialect has been a local variant that has not been heavily influenced by the standard language and that can trace a separate development all the way back to Old Norse.
Many of the genuine rural dialects, such as those of Orsa in Dalarna or Närpes in Österbotten, have very distinct phonetic and grammatical features, such as plural forms of verbs or archaic case inflections.
These dialects can be near-incomprehensible to a majority of Swedes, and most of their speakers are also fluent in Standard Swedish.
The different dialects are often so localized that they are limited to individual parishes and are referred to by Swedish linguists as "sockenmål" (lit.
"parish speech").
They are generally separated into six major groups, with common characteristics of prosody, grammar and vocabulary.
One or several examples from each group are given here.
Though each example is intended to be also representative of the nearby dialects, the actual number of dialects is several hundred if each individual community is considered separately.
This type of classification, however, is based on a somewhat romanticized nationalist view of ethnicity and language.
The idea that only rural variants of Swedish should be considered "genuine" is not generally accepted by modern scholars.
No dialects, no matter how remote or obscure, remained unchanged or undisturbed by a minimum of influences from surrounding dialects or the standard language, especially not from the late 19th century onwards with the advent of mass media and advanced forms of transport.
The differences are today more accurately described by a scale that runs from "standard language" to "rural dialect" where the speech even of the same person may vary from one extreme to the other depending on the situation.
All Swedish dialects with the exception of the highly diverging forms of speech in Dalarna, Norrbotten and, to some extent, Gotland can be considered to be part of a common, mutually intelligible dialect continuum.
This continuum may also include Norwegian and some Danish dialects.
The samples linked below have been taken from SweDia, a research project on Swedish modern dialects available for download (though with information in Swedish only), with many more samples from 100 different dialects with recordings from four different speakers: older female, older male, younger female and younger male.
The dialect groups are those traditionally used by dialectologists.
Överkalix, Norrbotten; younger female  Burträsk, Västerbotten; older female  Aspås, Jämtland; younger female  Färila, Hälsingland; older male  Älvdalen, Dalarna; older female (this is Elfdalian)  Gräsö, Uppland; older male  Sorunda, Södermanland; younger male  Köla, Värmland younger female  Viby, Närke; older male  Sproge, Gotland; younger female  Närpes, Ostrobothnia; younger female  Dragsfjärd, Finland Proper; older male  Borgå, Eastern Uusimaa; younger male  Orust, Bohuslän; older male  Floby, Västergötland; older female  Rimforsa, Östergötland; older female  Årstad-Heberg, Halland; younger male  Stenberga, Småland; younger female  Jämshög, Blekinge; older female  Bara, Scania; older male  
Standard Danish ("rigsdansk") is the language based on dialects spoken in and around the capital, Copenhagen.
Unlike Swedish and Norwegian, Danish does not have more than one regional speech norm.
More than 25% of all Danish speakers live in the metropolitan area of the capital, and most government agencies, institutions, and major businesses keep their main offices in Copenhagen, something that has resulted in a very homogeneous national speech norm.
In contrast, though Oslo (Norway) and Stockholm (Sweden) are quite dominant in terms of speech standards, cities like Bergen, Gothenburg and the Malmö-Lund region are large and influential enough to create secondary regional norms, making the standard language more varied than is the case with Danish.
The general agreement is that Standard Danish is based on a form of Copenhagen dialect, but the specific norm, as with most language norms, is difficult to pinpoint for both laypeople and scholars.
Historically Standard Danish emerged as a compromise between the dialect of Zealand and Scania.
The first layers of it can be seen in east Danish provincial law texts such as Skånske Lov, just as we can recognize west Danish in laws from the same ages in Jyske Lov.
Despite the relative cultural monopoly of the capital and the centralized government, the divided geography of the country allowed distinct rural dialects to flourish during the centuries.
Such "genuine" dialects were formerly spoken by a vast majority of the population, but have declined much since the 1960s.
They still exist in communities out in the countryside, but most speakers in these areas generally speak a regionalized form of Standard Danish, when speaking with one who speaks to them in that same standard.
Usually an adaptation of the local dialect to "rigsdansk" is spoken, though code-switching between the standard-like norm and a distinct dialect is common.
Danish is divided into three distinct dialect groups, which are further subdivided in about 30 "dialektområder":  Insular Danish ("ømål"), including dialects of the Danish islands of Zealand, Funen, Lolland, Falster, and Møn  Jutlandic ("jysk"), further divided in North, East, West and South Jutlandic  Bornholmsk dialect ("Bornholmian") the dialect of the island of Bornholm The term "Eastern Danish" is occasionally used for Bornholmian, but including the dialects of Scania (particularly in a historical context).
The background for this lies in the loss of the originally Danish provinces of Blekinge, Halland and Scania to Sweden in 1658.
The island of Bornholm in the Baltic Sea also belongs to this group, but returned to Danish rule in 1660.
This means that the spoken language in this part of Sweden is descended from a regional variant of Danish, while the written language used is standard Swedish, which evolved in Uppsala and Stockholm.
Similarly, the Norwegian language is classified as a descendant of West Norse, while the written language used by the vast majority in Norway is derived from an older variant of standard Danish.
A few generations ago, the classical dialects spoken in the southern Swedish provinces could still be argued to be more Eastern Danish than Swedish, being similar to the dialect of Bornholm.
Today, influx of Standard Swedish and Standard Danish vocabulary has generally meant that Scanian and Bornholmian are closer to the modern national standards of their respective host nations than to each other.
The Bornholmian dialect has also maintained to this day many ancient features, such as a distinction between three grammatical genders, which the central Insular Danish dialects gave up during the 20th century.
Standard Danish has two genders and the definite form of nouns is formed by the use of suffixes, while Western Jutlandic has only one gender and the definite form of nouns uses an article before the noun itself, in the same fashion as West Germanic languages.
Today, Standard Danish is most similar to the Insular Danish dialect group. 
Scanian is considered a separate language mainly from a historical or cultural point of view and is not regarded as a separate language by the Swedish government.
The boundaries established in traditional Swedish dialectology as a delimiter for the South-Swedish dialect area ("Sydsvenska mål" in Swedish) are approximately the same, and also include within its classification most of the historical Skåneland region, but with the exception of Bornholm and with the addition of the old border region in southern Småland.
Scanian was in the 15th edition of the Ethnologue (2005) classified as a regional language by SIL International, but before the latest update (2009), the Swedish representative to ISO/TC 37, the technical committee overseeing ISO 639, required that Scanian be removed from the ISO/DIS 639-3, the draft just prior to the final draft FDIS, or a positive vote from Sweden would not be forthcoming .
A request for reinstatement was submitted during the 2009 annual review process, but rejected on the grounds of mutual intelligibility; it is listed in ISO 639-6 with code scyr.
Within the previous SIL International classification of Scanian were the dialects in the province of Scania, some of the southern dialects of Halland ("halländska" in Swedish), the dialects of Blekinge ("blekingska" in Swedish) and the dialects of the Danish island of Bornholm ("bornholmsk" in Danish).
With the establishment of the Scanian Academy and with recent heritage conservation programs, funded by Region Skåne and the Swedish Government, there is a renewed interest in the region for Scanian as a cultural language and as a regional identity, especially among younger generations of Scanians.
Many of the genuine rural dialects have been in decline subsequent to the industrial revolution and urbanization in Sweden.
The population of Skåne County consists of around 13% of the total population in Sweden.