For the WordPress version, you can use Google Language Translator plugin, so that your visitor will have an option to choose language when viewing your store locator.
Link: https://wordpress.org/plugins/google-language-translator/
Author: Rob Myrick
Important Notice: The plugin will translate your store data in the database as well, which is very convenient and minimize data entry effort.
Example translation as screenshot below:
Below is a video guide on how to use Google Language Translator Plugin by WP Beginner – WordPress Tutorials
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