weDevs

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Sabbir Ahmed

Dokan, Inc.

Rafsun Chowdhury

Dokan Multivendor is based on the famous eCommerce solution WooCommerce. To enable multiple language feature WPML is the most reliable solution. These 5 extensions below is required to translate a WooCommerce store-
<ol>
<li><a href="https://wpml.org/?aid=106335&affiliate_key=EbXH25fvBE9b" rel="nofollow ugc">Sitepress Multilingual</a></li>
<li>WooCommerce Multilingual</li>
<li>WPML Translation Management</li>
<li>WPML Media</li>
<li>WPML String Translation</li>
</ol>
You can purchase and download all these plugin from the same site. Some of these are free!
After purchasing all these extensions and installing, you need to install this extension. It will not work unless you have activated all the plugins mentioned above.
Please remember to set the URL structure to <code>site.com/lang</code>.
Dokan does not support URL parameters. So you can NOT set the URL structure to be <code>site.com?lang=nl</code>
This extension does not have any settings. Everything is controlled from WPML settings page.

Dokan WPML

WPML integration for Dokan Multivendor Plugin

Sergey Biryukov

Converts gettext binary message catalogs to an array of strings. Allows to save some amount of RAM on a shared hosting server. 
Works with plugin and theme textdomains as well as with the default.
Thanks to AlexPTS for the idea.

Pure PHP Localization

Лучший и, скорее всего, единственный рабочий плагин. Спасибо, Сергей

Пожалуй, лучший плагин для кеширования переводов

Converts gettext binary message catalogs to an array of strings.

Dokan WPML vs Pure PHP Localization