Globalis, but that's a word of relatively recent coinage (i.e., it's less than 500 years or so old). If you want Latin an ancient Roman might have understood, then perhaps universalis "universal, of general application" or totius mundi "of the whole world" might serve.
you say helmet in latin (casco)<- in latin
To say "Who am I?" in Latin you can say "quisnam sum Ego?"
How do you say determined in Latin?
infitialis is the word we say in latin
There is no word for 'global' in the sense of 'worldwide'. The concept hadn't come around yet.
To say the word lightning in Latin, a person would say the word "ignis." To say thunder in Latin, the word is "tonitrua."
my is "mihi" in latin
There are no articles in Latin. (a, the, an)
"Sī placet" is how you say "please" in Latin.
legato is how you would say legacy in Latin.
To say Wilson in pig latin, you would say "Ilsonway."
To say hello in pig Latin, you would say "ellohay".