amemiku

The SEO Slugs 4 bbPress plugin removes common words like ‘a’, ‘the’, ‘in’ from post slugs to improve search engine optimization.
For example, when you publish a post with a title like this:
“What You Can Do Immediately For Higher Rankings”,
WordPress automatically assigns a long filename to your post, called a post slug:
/what-you-can-do-immediately-for-higher-rankings
SEO Slugs 4 bbPress plugin strips common words like “what”, “you” or “can” out of your post slug to make it more search engine friendly. With SEO Slugs plugin activated, the slug for our example blog post would look like this:
/immediately-higher-rankings
The slug is generated on saving a post (so you get a chance to look at it before publishing, and change it), or on publish. It won’t overwrite an existing slug. You can force a new slug generation by deleting the existing one.

SEO Slugs 4 bbPress

Removes common words like 'a', 'the', 'in' from post slugs to improve SEO.

Redwoodcity

When a post title contains multi-byte characters (such as Japanese), WordPress generates a URL-encoded slug like <code>%e3%81%82...</code>, which results in a long and unreadable permalink.
This plugin replaces such auto-generated slugs with <code>{post_type}-{post_ID}</code> (e.g. <code>post-123</code>). A multi-byte slug is kept as-is when the user has explicitly specified it.
<h4>Usage</h4>
<ol>
<li>Go to “Settings” -> “Default Permalink” in the WordPress admin.</li>
<li>Check “Enable” and save changes.</li>
</ol>

Default Permalink

Prevents multi-byte (URL-encoded) slugs in the default permalink. Multi-byte URL can still be used when the user explicitly specifies it.

SEO Slugs 4 bbPress vs Default Permalink