For international companies, the prediction game must of course be multilingual. No problem with Kicktipp. Simply activate additional languages in the admin area: menu "Languages". Make sure that you then also translate the individual texts, for example in the menu "Design/Texts", into the corresponding languages.
When inviting international players, you can then use a different link for each language. This will take each player directly to the correct page in the respective language. You will find the instructions for this in the menu "Languages" in your admin area.