If you want to make any text to be translated you have to use a plugin and mark the text as translatable. To do so you have to use __() or _e() instead of echo. The difference beetwen __() and _e() is that first one doesn’t echo the text while second one does. So if you do something like this: __("Some text", "text domain") it will be marked as translatable text but it won’t be displayed but if you use _e("Some text","text domain") the text will be also displayed on screen. Now if anyone will install a plugin he will see translated text
