This is the 8270th most frequent French word.
washtenaw
The word "Washtenaw" is not French; it refers to a geographic name, specifically a county in Michigan, USA.
In this sentence, 'Washtenaw' is used as a proper noun, referencing a geographical location.
Washtenaw est une région située dans l'État du Michigan.
Washtenaw is a region located in the state of Michigan.
Here, 'Washtenaw' is again used as a proper noun to specify a county name.
Le comté de Washtenaw est connu pour ses universités prestigieuses.
Washtenaw County is known for its prestigious universities.
Within this context, 'Washtenaw' is presented as a location being traversed.