The “mul” locale is used to provide multiple languages in the Text element. The JSON object shall include a key “t” which consists of an array of locale and text pairs with the locale being the first element of the pair array.
An example which provides 2 languages.
{
“t”:[
[“de-DE“, “Ich bin dein text 1,2345”],
[“en-US”, “I’m your text 1.2345”]
]
}