paulpascual

Dialekt automatically translates your WordPress website into multiple languages. Simply install the plugin, enter your API key, and your site becomes multilingual.
Features:
<ul>
<li>Automatic translation of all page content</li>
<li>Language selector widget</li>
<li>SEO-friendly URLs with language prefixes (/fr/, /en/, etc.)</li>
<li>No performance impact – translations are cached</li>
</ul>
<h3>External services</h3>
This plugin connects to Dialekt’s translation service to provide automatic website translation functionality. The service is required for the plugin to translate your website content into multiple languages.
What data is sent and when:
The plugin loads a JavaScript file from Dialekt’s CDN (https://cdn.dialekt.io/dialektweb.js) on every page view of your website. This script receives your API key as a data attribute, which is used to identify your account and retrieve translation settings. The script then automatically translates the visible content on your website based on the user’s language preference.
Service information:
This service is provided by Dialekt. For more information, please review our terms of service and privacy policy: 
* Terms of service: https://dialekt.io/terms 
* Privacy policy: https://dialekt.io/terms

Dialekt

Automatic website translation by Dialekt.

Stu West

This plugin gives WordPress developers easy access to localized country, region, language, currency, time zone, and calendar info from the <a href="http://cldr.unicode.org/" rel="nofollow ugc">Unicode Common Locale Data Repository</a>.
With the plugin active, WordPress developers can access the following for over 100 WordPress locales:
<ul>
<li>Names for countries (and ISO 3166 country codes).</li>
<li>Names for regions (and UN M.49 region codes, plus countries included in each region).</li>
<li>Names for languages (and ISO 639 language codes).</li>
<li>Names and symbols for currencies (and ISO 4317 currency codes).</li>
<li>Names for time zone example cities (and IANA time zone IDs).</li>
<li>Calendar information including the first day of the week in different countries.</li>
<li>Country information including telephone codes, most spoken languages, currency, and population.</li>
</ul>
More information in the <a href="https://automattic.github.io/wp-cldr/class-WP_CLDR.html" rel="nofollow ugc">detailed API documentation</a>.
CLDR is a library of localization data coordinated by Unicode. It emphasizes <a href="http://cldr.unicode.org/translation/country-names" rel="nofollow ugc">common, everyday usage</a> and is available in over 700 language-region locales. It is <a href="http://cldr.unicode.org/index/downloads" rel="nofollow ugc">updated every six months</a> and used by <a href="http://cldr.unicode.org/#TOC-Who-uses-CLDR-" rel="nofollow ugc">all major software systems</a>. CLDR data is licensed under <a href="http://unicode.org/copyright.html#Exhibit1" rel="nofollow ugc">Unicode’s data files and software license</a> which is on <a href="https://www.gnu.org/philosophy/license-list.html#Unicode" rel="nofollow ugc">the list of approved GPLv2 compatible licenses</a>.
Follow along with or contribute to the development of this plugin at https://github.com/Automattic/wp-cldr.

WP CLDR

Gives WordPress developers easy access to localized country, region, language, currency, time zone, and calendar info.

Dialekt vs WP CLDR