Template:Boolean/Normalize

Converts TibiaWiki's "yes/no" into comparable values:
 * if the parameter is "yes" or any supported variation of "yes",
 * if the parameter is "no" or any supported variation of "no".

Parameters:
 * 1 (unnamed parameter 1) : the string to compare for truthiness. Should be a value described above. If this parameter is specified or is empty, the  parameter will be used instead.
 * default : the default value to use for the comparison. If none is specified or the default does not map to a supported "yes" or "no" variation, an error will be produced when the default is used.

To compare against values output by this template, use the following templates. Do not rely on this function returning some specific value for given inputs.
 * Template:Boolean/True
 * Template:Boolean/False