Minor correction: you mean i18n, not i10n. There's i18n, and l10n, meaning internationalization and localization. Internationalization is about the code abstraction that enables for strings to be swapped out for languages. l10n is actually using the the i18n code to implement a specific language, e.g. French.

Source: https://blog.mozilla.org/l10n/2011/12/14/i18n-vs-l10n-whats-...