Duplicate variables

If i have variable called for example "EventStart", can i duplicate it for to set info in different language, and is that will show in same time like 1st message.

For example:
in my json:
"EventStart": "Info for English Player is here",
"EventStart": "Info for Polish Player is here"

will show on my chat server:

[Server]: Info for English Player is here
[Server]: Info for Polish Player is here

or it will be error for duplicate variable

 

No error but only the last will be shown.

 

So how can i set multilanguage variables ?

 

Lang > locale > keys per language.
Your plugin will need to keep track of user locale to be able to serve the correct message.

 

But i find something like that:
"EventStart": [
"EventStart": "Info for English Player is here",
"EventStart": "Info for Polish Player is here"
],

 

Code:

{
    "EventStart":
        {
            "pl-PL": "Info for Polish Player is here",
            "en-US": "Info for English Player is here"
        }
}