Welcome is an English equivalent of 'Wilkom'.
I think you mean verkleed, which means "dressed".
The word "Wilkom" is of Polish origin, derived from the phrase "Witamy," which means "welcome." It is often used to greet someone warmly. The spelling "Wilkom" may also appear in other cultures or languages, but it is most commonly associated with Polish.
These German Pennsylvania immigrants are called the Pennsylvania Dutch, a misnomer- the German word for German is "Deutsch," but these people were mistakenly called Dutch.
hallo
hinkel
esse
The expression "Pennsylvania Dutch" referring to this group of people is an alteration of the word "Deutsch" meaning "German." The Pennsylvania Dutch are actually as much of Swiss origin as German.
My grandfather was Pennsylvania Dutch; he used "kaput" to mean junk, broken, worn out. My guess is that the original is related to German.
pretty = hibsch
Nothing in German, as far as I know. There is a Native American word wawa, meaning a Canada goose; that word gives its name to the town of Wawa, Pennsylvania, and the Wawa chain of convenience stores.
to bake (verb) = backe
Apple = AppelApples = Eppel