About English Some of your complaints have been fixed Other examples are idiomatic to mathematics writing and hence may not be fixed About jargon Mathematics like any highly technical field has its own jargon which does not appear in nonmathematical dictionaries Part of the function of Wikipedia is to explain and exemplify jargon for readers so that they can understand other texts that use such jargon About difficulty This is a common complaint about mathematics articles on Wikipedia See FAQ at the top of the project talk page here This Projective plane article is not a bad offender in comparison to many other articles It attempts to give visual intuition historical context applications etc The later parts of the article are more obscure but only highly motivated readers will attempt those anyway Fundamentally this is an article about a moderately advanced mathematical topic that few nonmathematical laymen ever encounter So the difficulty seems about right to me Yes there is always room for small improvements but no dramatic change in tone organization content etc is warranted