Modeewine

<h4>What is «Polylang Theme Strings» and what for is it?</h4>
This plugin gives additional features to the plugin Polylang. It automatically scans all templates files and scripts of the active WP theme (and all plugins) for available strings that can be translated. For example:
<ul>
<li><code>pll__('...');</code></li>
<li><code>pll_e('...');</code></li>
</ul>
and adds them to the Polylang registery, after what you can manage the translation of finded strings using the administration panel. It will make your life easier for the development of multilanguage’s projects, because you will not need to enter the needed strings to translate manually – the plugin will do all the work for you. 
Don’t forget that in the example are described the PHP-function calls, that is why they have to be inside of PHP-tags.
<h4>How works «Polylang Theme Strings»?</h4>
You have to install the plugins «Polylang» and «Polylang Theme Strings» on your multilanguage WordPress CMS project and they must be both active. When you are in the settings of plugin (Polylang) in the tab «Strings translation» the «Polylang Theme Strings» scans automatically the active theme of your project, find all the code strings that needed to be translated, adds them to the register, displays them on that page and gives to user the ability to translate these strings.
Like you can see, the «Polylang Theme Strings» is perfectly integrate with the «Polylang» plugin and works in automatically mode – it is comfortable, simple, and useful!
From version 4.0 «Polylang Theme Strings» got settings page where you can configure the search strings-translations more deeply.
Learn more in <a href="http://modeewine.com/en-polylang-theme-strings" rel="nofollow ugc">http://modeewine.com/en-polylang-theme-strings</a>.

Polylang Theme Strings

I think there is a bug and it is changing the site language to english.

Works fine

Automatic scanning of strings translation in the theme and registration of them in Polylang plugin. Extension for Polylang plugin.

NicolasKulka

Amaury Balmer

Maxime Culea

BE API

You are using Advanced Custom Fields for creating option pages and you have Polylang installed for awsome multilingual site ?
Sadly, Polylang is not handling ACF’s Option Pages. Which means values will be the same for all languages you have set.
We are here to save your life ! Once this plugin is activated, you will be able to set a different value for each language, and if none is set, the “All languages” value will be used as default one.
How ?
This plugin will store a value for each language into database. Then Polylang’s languages are used to get the values from the DB. That means at activation, all existing data will not be anymore available, but still in database. You will retrieve it at plugin deactivation.
Then to set and contribute your option page, simply use the Polylang’s language admin flags ui.
Features
<ul>
<li>Almost simple fields (text, textarea, links, etc)</li>
<li>Repeater fields (with simple fields)</li>
</ul>
Who ?
Created by <a href="https://beapi.fr" rel="nofollow ugc">Be API</a>, the French WordPress leader agency since 2009. Based in Paris, we are more than 30 people and always <a href="https://beapi.workable.com" rel="nofollow ugc">hiring</a> some fun and talented guys. So we will be pleased to work with you.
This plugin is only maintained, which means we do not guarantee some free support. Consider reporting an <a href="https://github.com/BeAPI/acf-options-for-polylang/issues" rel="nofollow ugc">issue</a> and be patient.
To facilitate the process of submitting an issue and quicker answer, we only use Github, so don’t use WP.Org support, it will not be considered.

ACF Options For Polylang

Add ACF options page support for Polylang.

Polylang Theme Strings vs ACF Options For Polylang