Module:Multilingual description/doc

Provides the logic for Template:Multilingual description.

See also:
 * Module talk:Multilingual description/sort/testcases — test and show details for sorting languages
 * Category:Multilingual descriptions using conflicting language codes — tracking conflicting descriptions (when language codes are normalized and remapped, or splitted from distinct keys)
 * Category:Multilingual descriptions using deprecated language codes — tracking legacy language codes
 * Category:Multilingual descriptions using unsupported language codes — tracking unsupported language codes (most often language codes with regional variants) which may need to be remapped