水野史土

This plugin enables to see the source and the target of each translation word/phrase/sentence. When you use other than English locale, all messages that are translated via gettext will be shown in both the source language and the target language. For example, “error” will be shown as “error” + “erruer”
Since version 2.0, you can display glotpress links. Go to Settings -> Reading, and you will find ” Show GlotPress link” checkbox.
<a href="http://ounziw.com/2011/06/28/english-japanese/" rel="nofollow ugc">Japanese description</a> is also available.
CAUTION: This plugin is used for debug. DO NOT ACTIVATE ON A LIVE SITE!

Debugging Translation

Messages are displayed in both the source language and the target language.

gilles66

Need to know which template is used by WordPress to display your pages in the front office ? 
This plugin simply does this.
Show the name of the php file of your theme used to display the current page.Need to know which template is used by WordPress to display your pages in the front office ? 
This plugin simply does this.
Efficient and very easy to install, it will show you in the admin bar the name of the php file currently used to display the current page. 
The color of the text is different regarding the origin of the template(the theme, a parent theme, or a plugin) 
(icon author :http://www.megaicons.net/iconspack-1096/45043/)

which template file

Show the name of the php file of your theme used to display the current page.

Debugging Translation vs which template file