Separation into several languages (multilanguage)

Intro:
1. EasyDiscuss version: 3.2.9385 is clean installed on Joomla 3.2.3 with JA Purity III template.
2. My site has configured two languages​​: Russian and English
3. Main menu on each language has one item: "Home" (En) or "Главная" (Ru) with main page template EasyDiscuss.
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Questions:

1. Language Switcher (click on flag icon) loses the current link (relative path after language code).
Example links on both languages (before language change):

EN: http://domain.com/en/home/thank-you-for-choosing-easydiscuss.html

RU: http://domain.com/ru/%D0%B3%D0%BB%D0%B0%D0%B2%D0%BD%D0%B0%D1%8F/thank-you-for-choosing-easydiscuss.html

After language change (click on flag icon) to another, URL truncated:

EN->RU: http://domain.com/ru/

RU->EN: http://domain.com/en/

Is there a way to keep a relative URL after language change?

2. Is it possible to separate the discussion (category, tag, search, etc.) created by using the selected language and created by using other? People have only seen all discussions and topics for the current (selected by the user) language. Information from other languages ​​should not be available when the user interacts with the site in the selected language. (until the user himself does not change it)

3. Is it possible to create multi-lingual structure categories and predefined tags? If not - planned in the future?

4. Auto-translation user-content from source language to selected (current language) dynamically - planned in the future?

Thanks.