Sometimes Wikipedians sound like they are speaking in a foreign language, even when they are not. This is because they have created many specialized terms (jargon) pertaining to Wikipedia. Fortunately, they have also created a Wikipedia Glossary to explain these terms.
Remember, actual encyclopedia articles should be written in jargon-free language which is readily understandable without specific knowledge of the Wikipedia project.
Read more: Wikipedia:Glossary
Wikipedia:Explain jargon