Internationalization needs fixing

[erciccione]

Some pages are internationalized and others are not.

Internationalized pages:

• about/roadmap/
• about/team/
• community/merchants/
• get-firo/buy-firo/
• get-firo/download/

Not internationalized pages

• about/faq
• blog
• community/social/
• user guide page and all user guides

Mixed (some parts are some parts are not)

• about/research

While i see that translating user guides can be time consuming and it's probably better avoid it at this stage, every other page should be internationalized.