It helps if you know html, css and php to modify your template - also have a backup.
I assume you have changed to using YourArcade template.
Edit: templates\yourarcade\overall.html
Scan the file or do a search where you want your code to go. For example search for the title 'Members' for the top-left, it should have a structure like this:
<div class='bcontentsection'>
<div class='bcontenthead'>(Title)</div>
<div class='contenttext'>
(content)
</div>
</div>
Paste the google translate script where ever you want it (for example make the same structure as member replacing the title and content and place it below):
For the logo replacement, check under templates\yourarcade\images\logo.png
For Mochi Games, sign up on Mochimedia.com as a publisher, verify your website with the file upload or whatever. Setup your Mochi grabber and get some games from Mochi. The site will then take care of the rest, it's will only a few cents for the moshi ads and would be better to have website advertising as well if to make a profit.