Template:Zodiac/documentation

Usage
There are four required positional parameters:
 * The first is the language code; see List of languages.
 * The second is the filename of a picture representing the zodiac sign, preceded by.
 * The third is the entry title for the preceding zodiac sign, and
 * the fourth is the entry title for the following zodiac sign.

Thus for example the entry Aquarius might have

The optional  parameter is to the name of the Wikipedia article if that doesn't match the current entry title. Thus for example the entry Cancer might have

(since the Wikipedia article "Cancer" isn't about the zodiac sign, but "cancer (astrology)" is).