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.

JS Morisset

The JSM Show User Metadata plugin displays user profile meta keys and unserialized values in a metabox at the bottom of the user profile editing page.
There are no plugin settings – simply install and activate the plugin.
<h4>Available Filters for Developers</h4>
Filter the user meta shown in the metabox:
<pre><code>'jsmsum_metabox_table_metadata' ( array $metadata, $user_obj )
</code></pre>
Array of regular expressions to exclude meta keys:
<pre><code>'jsmsum_metabox_table_exclude_keys' ( array $exclude_keys, $user_obj )
</code></pre>
Capability required to show user meta:
<pre><code>'jsmsum_show_metabox_capability' ( 'manage_options', $user_obj )
</code></pre>
Show user meta for a screen base (defaults to true):
<pre><code>'jsmsum_show_metabox_screen_base' ( true, $screen_base )
</code></pre>
Capability required to delete user meta:
<pre><code>'jsmsum_delete_meta_capability' ( 'manage_options', $user_obj )
</code></pre>
Icon for the delete user meta button:
<pre><code>'jsmsum_delete_meta_icon_class' ( 'dashicons dashicons-table-row-delete' )
</code></pre>
<h4>Related Plugins</h4>
<ul>
<li><a href="https://wordpress.org/plugins/jsm-show-comment-meta/" rel="ugc">JSM Show Comment Metadata</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-order-meta/" rel="ugc">JSM Show Order Metadata for WooCommerce HPOS</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-post-meta/" rel="ugc">JSM Show Post Metadata</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-term-meta/" rel="ugc">JSM Show Term Metadata</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-user-meta/" rel="ugc">JSM Show User Metadata</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-registered-shortcodes/" rel="ugc">JSM Show Registered Shortcodes</a></li>
</ul>

JSM Show User Metadata

throws now errors/warnings, good performance, just fulfills it's job. 5 stars

just works

Show user metadata in a metabox when editing users - a great tool for debugging issues with user metadata.

Debugging Translation vs JSM Show User Metadata