No cherrybim, you missed it. There is only one language that has a holiness by itself, which is Hebrew – Lashon Kodesh, the Holy Tongue.
Yiddish is used for learning, true – but that doesn’t give the language its own holiness. The words you say are holy because of the content, not the language itself. If you incorporate Hebrew words into Yiddish, those words have holiness not because they’re Yiddish, but because they’re Hebrew!