A few changes in the template. Configuration

Hi

I need help with configuration theme. Flat Desire MyBB Theme
I have problem with

1. How to translate for my language the inscription "posts" and "topics" in general site.


2. I have a problem with a font "open_sansregular" with characters. How to change font and choose a new good one. My language used ą ś ę ó and font have problem. How to correctly add a new font?
example


3. How to translate the information Welcome in user control panel, where? I can not find, and also i need translate "Search..." in Search Bar Hover

4. How to change only the link color in posts.?
Now links are invisible and have the same color as the font.
When I change the link color in global.css also is changing color in the name of the, author post, Post: #3

Is possible to change the color of the link in the post and signature?

5. Is possibile on "description of the sections" was visible
example screenshot


6. How add recent posts in the sidebar to last topics shown correctly, just type in the index? {$ latest threads}

7. There is a problem in Postbit Custom does not display properly, example screenshot


8. If I change the font size in the post also changing the icon on the right , "Edit" "Delete" "Quote" how to fix it

9. How to set for all users the same color forum, for example green

10. How make more panel in sidebar like "advertisement"


11. How set to do not display again/ stop the redisplay The green Annotation bar/ announcements


Best regards