Can Mail Art Save a Language?

Wymysorys is a language with less than 100 speakers and classified as critically endangered by UNESCO. The language is spoken in Wilamowice where a group of locals are working to preserve it.  Wilamowice is a town with about 3,000 people in Southern Poland.  

Wymysorys belongs to the Germanic Language Family. But it is not German.  It is believed its origins come from Western Europe when a mix of Flemish and German speaking settlers moved east during the 13^thCentury. Wymysorys’s speakers are ethnically and culturally Polish. For centuries the speakers did not identify themselves as Germans. After World War II they were allowed to remain in Poland but the use of Wymysorys was officially discouraged.
 
My latest series of mail art preserves some Wymysorys vocabulary.  I have included words like brif (letter) mark (stamp), pöstkiöt (postcard) and briftröejer (mail carrier). This might be the first time the language has ever been used in mail art. But no, mail art cannot save a critically endangered language.