Forms Overview

Default layout can be used to see the basic code in the editor that can be tweaked for styling. 

How to place the standard submit button?

(in source view)

<input type="submit" value="Submit"/>

where value="Submit" defines what word will be displayed on button iteslf.

In case of the Translations module, the code would be as follows:

<input type="submit" value="Submit" sys:tr="value"/>