manojtd

Easy Translator is a plugin to translate your blog posts and pages. It provides a customizable widget to enable machine translation (from Google or Microsoft).
Easy Translator also provides a tool for plugin authors and translators. This tool picks up translatable strings (in <code>_[_e]()</code> functions) and presents them and their existing translations (from the MO object of the current text-domain, if loaded) in a user editable form. It can generate a valid PO file that can be emailed to the plugin author.
The <a href="http://buy.thulasidas.com/easy-translator" title="Buy the Pro Version for $4.95" rel="nofollow ugc">Pro Version</a> adds the following features:
<ol>
<li>Color-pickers for the blog post translation widget, to customize and match your colors with your theme.</li>
<li>Machine translation help to seed your plugin translation efforts. That is, for each translatable string found, it will give you a translation as provided by Google, which you can edit and perfect.</li>
<li>Auto identification of the text-domain used by the plugin being translated.</li>
<li>Email support so that your translators can send the PO file directly from the its window, streamlining their work.</li>
</ol>
If you are a plugin author interested in internationalizing your plugins, you may want to ask your potential translators to install Easy Translator to make it a snap to give you translations. If you want to clean up your internationalization, you will appreciate Easy Translator because it does a fuzzy string matching to highlight possible repetitions and conflicts among key strings.

Easy Translator

Great plugin

Easy Translator is a machine translator for blog posts and a plugin translation tool for developers and translators.

comotive

Supertext

msebel

This plugin allows the user to send a WordPress post or page to Supertext for translation or proofreading.
Process for translation
Supertext can translate content, titles, excerpts, image captions, shortcode arguments and custom fields. Simply order a translation instead of creating a new page. 
You will be presented with services, prices and deadlines. Select the right one for you. 
Once completed, the translation will be automatically inserted into a new page or post in your WordPress installation. 
You’ll be notified by email once your translated content has been uploaded to your website. 
This works for every post type that is translatable by Polylang or WPML.
Process for proofreading
For proofreading your existing page or post, select the option “order proofread”. You will be presented with services, prices and deadlines. 
Select the right one for you. Once completed, the proofread text will automatically be inserted into your post or page in your WordPress installation.
Please note
Translatable custom fields must be defined in the settings. Supported plugins at the moment are:
<ul>
<li>Advanced Custom Fields</li>
<li>Yoast SEO</li>
<li>All In One SEO pack</li>
</ul>
If the field is not available in one of the lists, you can define it by adding self defined custom fields.
The plugin supports following page builders:
<ul>
<li>Visual Composer</li>
<li>Beaver Builder</li>
<li>BE page builder</li>
<li>Divi page builder</li>
<li>SiteOrigin page builder</li>
<li>Elementor</li>
</ul>
We highly recommend to test the translation process for the page builders mentioned above and for any other that you may use.

Supertext Translation and Proofreading

This plugin allows you to order human translations for your pages and posts using Supertexts professional translation services.

Easy Translator vs Supertext Translation and Proofreading