The first phase, internationalisation, encompasses the planning and preparation stages for a product built to support global markets. This process removes all cultural assumptions, and country- or language-specific content is stored so that it can be easily adapted. If this content is not separated during this phase, it must be fixed during localisation, adding time and expense to the project. In extreme cases, products that are not internationalised may not be localisable. Internationalization is often written as 'i18n' in the localization industry, where the number 18 is the number of letters between i and n in the English word.