English usage controversies

Disputes in English grammarDisputed English grammarconsidered it to be incorrectdisagreement about formal or standard usagedisputedisputed matter in English prescriptive grammarimproper Englishlong-standing but disputed rulepoint of dispute
In the English language, there are grammatical constructions that many native speakers use unquestioningly yet certain writers call incorrect.wikipedia
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List of English words with disputed usage

Disputed usagecommonly confused wordsdisputed
For an alphabetical list of disputes concerning a single word or phrase, see List of English words with disputed usage.
For a list of disputes more complicated than the usage of a single word or phrase, see English usage controversies.

Common English usage misconceptions

List of common English usage misconceptionscommon misconceptioncommon English usage misconception
See common English usage misconceptions.
Preposition stranding was in use long before any English speakers considered it to be incorrect.

Standard written English

written EnglishEnglishFormal written English
English is spoken worldwide, and the Standard Written English grammar generally taught in schools around the world will vary only slightly.
As there is no regulatory body for the English language, there is some disagreement about formal or standard usage, though there is enough agreement that the written form of English is relatively transcendent of dialectal variation.

Grammatical construction

constructionsconstructiongrammatical constructions
In the English language, there are grammatical constructions that many native speakers use unquestioningly yet certain writers call incorrect.

Register (sociolinguistics)

registerregisterslanguage register
Differences of usage or opinion may stem from differences between formal and informal speech and other matters of register, differences among dialects (whether regional, class-based, or other), and so forth.

Dialect

dialectsregiolectdialectal
Differences of usage or opinion may stem from differences between formal and informal speech and other matters of register, differences among dialects (whether regional, class-based, or other), and so forth.

Style guide

house stylestyle guidesstyle
Disputes may arise when style guides disagree with each other, or when a guideline or judgement is confronted by large amounts of conflicting evidence or has its rationale challenged.

Standard English

standardEnglishstandardized form of English
Arguments related to regional dialects must center on questions of what constitutes Standard English.

Where no man has gone before

... to boldly go where no man has gone beforeBoldly Goboldly go where no man has gone before