Travel let's us experience different cultures. No matter what dietary
habits or architecture, they are both different from country to
country.
No matter what using in this sentence is correct or not?
If it is wrong, how to modify it. Using whether or regardless of? I don't know
Best Answer
You would not use the phrase "no matter what" in that case. It does not mean "whether" - it means "always".
You could say
Which means "I will always love you, even if the situation changes".
The original sentence is wrong, or at least sounds strange.
If you want to say "many things are different in different cultures", you could say
But here, "They" would mean "different cultures". I think you're using it to mean "dietary habits or architecture", which is wrong in English.
Finally, you'd actually use "lets", not "let's". "Let's" would be short for "let is", which doesn't make sense.