Search text.

Two-letter storefront code, e.g. `us`, `gb` or `jp`, case-insensitive. Prices, ratings, reviews and text are specific to it. A code Apple does not run a store for is refused. Default: `us`.

Language of the text, as `ll-cc`, e.g. `es-mx` or `ja-jp`. Changes the language of descriptions and price labels inside the storefront. Default: the storefront's own language.

Where to search: `iphone` (iPhone and iPad apps), `ipad` or `mac`. Default: `iphone`.

Results to return, 1-200. Search often has 10 to 20 percent fewer results than asked for, so a shorter list is not an error. Default: 50.