Hello! If I want my site to be found by someone who doesn't type in English, can I add words in Russian to the list of english keywords... So it would look like this: keyword, ключевое Ñлово, форум, forum In Joomla I can make a list of SEO keywords and so far I only use words in English.
Sure, just follow good SEO practices with Russian (or whatever language) and you'll be fine. Local Google's recognise local character sets (eg. google.ru recognises Russian)