Real answers and I don’t disagree with the premise.
The best overall solution, as with most things, is money. With enough money (assuming that we don’t end up a pariah like North Korea or 2022 Russia), immigration and livelihood questions melt away. A good current target? Accessible assets worth more than 1 million per kid can get an investor visa to a country worth living in and a start to making a livelihood. More is of course much better.
Second to money is a skill that is portable to make money and that can build connections. Tech, business, elective medicine, and believe it or not— academia— are ideas to consider. Academia will be less well paid but there are pathways to jobs and networks. Seeking employment after graduation at large multinationals and looking for international work within them is a good pathway. For tech, you need to do something really meaningful and specialized at a high level for it to work. Look and see what paths are only available at North American or Western European schools and choose those. Learning to code throws you in with subcontinental people who want to come here for poverty wages.
Learning foreign languages and study abroad is good to begin building networks and getting comfortable in international settings, it’s the fundamentals and not what will get you there. Being able to write and speak excellently and clearly in English will be far more valuable internationally than almost any foreign language they can realistically learn.