Copy res/values/strings.xml to res/values-[language code]-r[country code]/strings.xml and begin your translation.

Once you have completed the translation, update res/values/arrays_i18n.xml with your translation details, including the language name and the translator's name. If there are multiple translators, separate their names with commas: , . Ensure that the order of the two arrays matches exactly; do not mix up the sequence.