Prose
The word "prose" first appears in English in the 14th century. It is derived from the Old French "prose", which in turn originates in the Latin expression "prosa oratio" (literally, straightforward or direct speech).
Polish language
The word "spruce" entered the English language from the Polish name of Prusy (a historical region, today part of Poland). It became "spruce" because in Polish, "z Prus", sounded like "spruce" in English (transl. "from Prussia") and was a generic term for commodities brought to England by Hanseatic merchants and because the tree was believed to have come from Polish Ducal Prussia. However, it can be argued that the word is actually derived from the Old French term "Pruce", meaning literally Prussia.