Wikipedia follows a conservative usage style for capitalization (unnecessary capitalization is avoided). The main use of capitalization is for proper names, acronyms, and initialisms. It may be helpful to consult MOS: Proper names if in doubt about whether a particular item is a proper name.
Capital letters are sometimes a matter of regional differences; for example, British writers and editors are more inclined to use them than their North American counterparts. If possible, as with spelling, use rules appropriate to the cultural and linguistic context.
Initial capitals or all capitals should not be used for emphasis. For example: "it is not only a LITTLE learning that is dangerous" and "it is not only a Little learning that is dangerous" are both incorrect; use italics instead: "it is not only a little learning that is dangerous".
Capitalize the first letter of the first word and any proper nouns in headings, but leave the rest lower case. Thus "Rules and regulations", not "Rules and Regulations". Titles such as president, king, or emperor start with a capital letter when used as a title (followed by a name): "President Nixon", not "president Nixon". When used generically, they should be in lower case: "De Gaulle was the French president." The correct formal name of an office is treated as a proper noun. Hence: "Hirohito was Emperor of Japan." Similarly, "Louis XVI was the French king" but "Louis XVI was King of France", King of France being a title in that context. Likewise, capitalize royal titles: "Her Majesty" or "His Highness". Exceptions may apply for specific offices. (more...)
B - A - utiful. Long may the fruitful, fair Free Kingdom of Wikimedia flourish. Long live its great and honourable monarchy and its noble government. Let them guide our great Kingdom to further success and conquest. Work, Labour, Toil for this Free Land that we may forever Rule over Them. All Heil King Jimbo I!
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