Popular alternatives to "thank you"

The context for my question might be a bit strange.

I have stuttering and therefore I have some difficulties pronouncing some words starting with particular phonetics. And I've found that if a sentence starts with a /th/ sound, it makes me feel uncomfortable.

Especially in the word is "thanks" or "thank you".

So I want to know if there's a popular alternative for "thank you" that may not seem strange and that unnatural. I've searched the website and I know there are alternatives like "I appreciate your help." but that sounds a bit overly formal for me. (Or is it? correct me if I'm mistaken.)

"Cheers" should be an acceptable alternative to "Thank you" in Hong Kong. You could also say "Much obliged" which is also often used. Another alternative is that annoying Australianism, "Ta!" which will conveniently avoid the /th/ sound. A less formal equivalent of "I appreciate your help" would be a simple "(I) Appreciate it" or similar.

Depending on the crowd, you could also employ the Spanish "Gracias!"

I checked a thesaurus and found much appreciated, which is a more informal version of “I appreciate your help.” That might suit your purposes.

I had one other thought: you could use the Spanish gracias. It’s not English, but, at least in the U.S., it's a well-known Spanish word. Most Americans know a modest handful of Spanish words, and even use them with each other on occasion (it's not uncommon to hear people part ways saying, “Hasta mañana,” for example).