Get ready in advance.
Of course, App Store has languages that are the most popular. However, simply adapting your product to each one can be risky. First, you should research and determine which languages are found among your users and in which countries your product or analogs are most in demand. You should also roughly estimate the potential benefits of entering new markets.
At the stage of preliminary preparation, it would also not hurt to analyze the activities of competitors. Find out exactly how they adapted their products, what they changed in descriptions, screenshots, and interfaces.
The preparation stage also includes planning for the expansion of your business. To do it, you need to develop such a product that can adapt to new languages without the need for significant engineering changes. This stage is called internationalization (I18N), and after that, you can start localizing.