Does Riot need Re-rated by ESRB Everytime they make a change?

The game pretty much always stays generally the same, but I noticed with Kled and Pyke they swear rarely unlike other champs. This led me to wonder if they have to be re-evaluated by ESRB every time they make a significant change such as releasing a new champ.
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We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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