Well, there's no direct translation, as there isn't a Klingon word for "futile" that I can find, nor a direct translation for "resistance."
Here's my best attempt at a translation (although someone else might suggest a better option):
{ju'omchugh bIluj}, literally, "If you resist us, you will fail."
Thanks. And written? I want to add this to training jersey for our club.
I put the letters in a second answer. For some reason, the pIqaD script won't post in the comment box but would in the answer box.
By written, do you mean using Klingon letters? Here you go:
That is so awesome. Thanks. This will add some fun factor for the kids.
Glad I could help. If you're looking for pronunciation help, check this page out: https://www.kli.org/about-klingon/sounds-of-klingon/
I cannot see the {qaghwI'} in the pIqaD.
Thank you. Any Chance I can get the writing of it?