“Use other localizations — for example if you were to add keywords to Mexican Spanish, those same keywords would be indexed for the US app store and have the same weight as the native US English localization.”

Add Mexican Spanish localization to inject more US App Store keywords for free

Apple indexes additional localizations (Mexican Spanish, UK English, Australian English) for the same store. Filling those extra 100-character keyword fields effectively multiplies your usable US keyword inventory at zero cost — a non-obvious ASO quirk that doubles keyword surface area without changing what users actually see.