1) this translation is from moment.js library, it already has many translations, you just need to specify correct language code and country code, so it will load appropriate language file. You can do it like this:

INSERT INTO `sys_localization_languages`(`Name`, `Flag`, `LanguageCountry`, `Title`, `Enabled`) VALUES
('ru', 'ru', 'ru_RU', 'Russian', '0');

2) TO make self-containing language file, you need to place translations for modules in your language module into data/langs/ directory, make a folder with module name there (for example 'aqb_notes'), then place language file in newly created folder, name of language file must match your language code (for example ru.xml)