The Store Locator Plus plugin is now part of the WordPress Translate project. You can get the current status of the Store Locator Plus translations on the WordPress Translation website. If you would like to see the plugin fully translated into your language, please send a request to be added to the WordPress translate team for your language. As soon as a language reaches 100% completion for the stable release of the Store Locator Plus plugin, the custom language files will be removed from Store Locator Plus and be replaced by the more-efficient Translate system.
Unlike single-language websites where all of the site content and administrative interfaces are operating under a single language, multilingual sites allow visitors to pick their language while viewing the website.
The most popular plugin for WordPress multilingual sites at the time of this writing is WPML.
Store Locator Plus has begun the journey into supporting multilingual sites with WPML. Changes to WPML in late 2015 will require further revisions to the WPML compatibility layers.
Since version 4.3.06 Store Locator Plus added features that will help the plugin and add-on packs communicate with WPML for user-configurable translation strings. While the entire fixed-text portion of Store Locator Plus uses gettext, a common language translation utility, there are many strings that appear as user-configurable settings. Options such as search and results labels fall into this category.
Store Locator Plus uses the built-in WordPress internationalization and localization tools to translate the interface text into various languages. Starting in October 2015, Store Locator Plus has become part of the WordPress Translate project. You can contribute translations for the base plugin at the Store Locator Plus directory at WordPress Translate.
If you do not see the base plugin in your language, check the SLP Translate report for the latest Stable Release and make sure your language is at 100%. The Translate system will not create a language export for partial translations. If you want to help with the translation, send a request to be added to the WordPress PolyGlots project.
Learn About Translate.WordPress.Org.