Is this English sentence correct?

[woerden]

Yeah, this whole "whilst" thing is very popular on the Internet nowadays, but not in normal, everyday conversation (in North America, anyway). (I noticed it beginning a year or so ago, on facebook and other social media sites...usually in the caption of a picture or video.) "Whilst" isn't wrong, but it's weird. Some dictionaries even say the word is obsolete, like "thou". Just use "while" if it's a conversation between Americans or Canadians.

"The seasoning will infuse the meat and won't fall off while you fry it," or "...while you're frying it."