because it's just another computer-translator, which can't deal with fictional words, jokes, puns, accents, double meanings, etc. and will sometimes make completely incomprehensible sentences.
example of what your message could end up like after going through such a translation program:
Found a random Youtube vid that built me miracle, why nietspel translators use this? Seems like it could shop alot of time and difficulty. Or is it normal "too easy"?