131.3. Cards that are printed in different languages but represent the same card are considered to have the same name for the purposes of deckbuilding and gameplay. Example: Chemtech Enforcer in English and its counterpart in Chinese are considered the same card, despite the Name element on the card reading differently.
131.4. Some cards have both a short name and a subtitle. For all purposes, including rules and deckbuilding, such a card’s name is “[Short Name], [Subtitle]”. Example: Kai’Sa, Evolutionary and Kai’Sa, Survivor both have the short name Kai’Sa, but they have different names. You can include 3 of each in your deck under normal deckbuilding rules. If one of them is your Chosen Champion, the other is not.