Init i18n support (#447)

* Use init hook instead of plugins_loaded

* WordPress tested

Author: lloc

phpcs.xml

@@ -105,7 +105,7 @@
     <rule ref="WordPress.WP.I18n">
         <properties>
             <property name="text_domain" type="array">
-                <element value="my-textdomain"/>
+                <element value="multisite-language-switcher"/>
                 <element value="library-textdomain"/>
             </property>
         </properties>

readme.txt

@@ -4,7 +4,7 @@ Contributors: realloc, lucatume
 Donate link: https://www.greenpeace.org/international/
 Tags: multilingual, multisite, language, switcher, localization
 Requires at least: 6.1
-Tested up to: 6.7
+Tested up to: 6.8
 Requires PHP: 7.4
 Stable tag: 2.9.5
 License: GPLv2 or later