WordFez is a plugin for bilingual (French-English) posts. It is seamlessly integrated into WordPress using a TinyMCE plugin.
It will add 2 extra buttons in the WYSIWYG interface for French and English language. Each button inserts 2 anchors to surround each language. The anchors are labeled by small flags. 
The usage is very straight-forward. The plugin comes with a widget to allow each reader to conveniently and instantly switch between the languages.
You need WordPress 2.5 at least.
New in v0.2.1:
<ul>
<li>Compatibility with WordPress 2.5</li>
<li>Fix a small problem in ‘alt’ fields</li>
</ul>

WordFez

WordFez is a plugin for bilingual (French-English) posts. It is seamlessly integrated into Wordpress using a TinyMCE plugin.

pepe

kingjeffrey

Improve your web typography with:
<ul>
<li>
Hyphenation — <a href="https://code.mundschenk.at/wp-typography/frequently-asked-questions/#faq-what-hyphenation-language-patterns-are-included" rel="nofollow ugc">over 70 languages supported</a>
</li>
<li>
Space control, including:
<ul>
<li>widow protection</li>
<li>gluing values to units</li>
<li>forced internal wrapping of long URLs & email addresses</li>
</ul>
</li>
<li>
Intelligent character replacement, including smart handling of:
<ul>
<li>quote marks</li>
<li>dashes</li>
<li>ellipses</li>
<li>trademarks, copyright & service marks</li>
<li>math symbols</li>
<li>fractions</li>
<li>ordinal suffixes</li>
</ul>
</li>
<li>
CSS hooks for styling:
<ul>
<li>ampersands,</li>
<li>uppercase words,</li>
<li>numbers,</li>
<li>initial quotes & guillemets.</li>
</ul>
</li>
</ul>

wp-Typography

Improve your web typography with: hyphenation, space control, intelligent character replacement, and CSS hooks.

WordFez vs wp-Typography