* Translators do not have to worry about trying to translate strings such as "third cousin twice removed" into a local phrase that has no equivalent.
==How to write a relationship calculator ==
The framework for relationship calculator plugins is in place. Here are the rules the language-specific plugins must obey to be compatible with the framework:
# The relationship plugins (here and below referred to as <code>rel</code> plugins) must define a class that can be instantiated with the [http://www.gramps-project.org/devdoc/api/2.2/private/GrampsDb._GrampsDbBase.GrampsDbBase-class.html GrampsDbBase] instance as its argument and that has a <code>get_relationship()</code> method obeying the following specifications: