Requirements to Sell Globally - HELP!


I have a baby care product (shampoos, etc) and I want to sell globally. I have been researching and the requirements are long - everything from language (french, spanish) changes to the label to adding batch/lot numbers, etc.

I see my competitors already sell in most countries, but they aren’t following these requirements. In Mexico, the package isn’t in Spanish for instance.

How do I know what “rules” I need to follow and which ones I can skip? I tried to ship product to FBA Canada and it was sent back from customs. Any advice would be great.