Zemnian has no specific language equivalent, but since Liam wanted to use his love of German for Caleb, it became a narrative reference/tool. The many other languages of Exandria (Elvish, Dwarvish, Marquesian) can have references, but do not really have any direct equivalents.
— Matthew Mercer (@matthewmercer) November 12, 2021
What language is marquesian equivalent to?
