SearchWP Polylang Integration
Polylang is a fantastic plugin that adds multilingual support to WordPress:
Polylang allows you to develop a bilingual or multilingual WordPress site. You write messages, and pages, develop classifications and post tags customarily, and afterwards specify the language for every one of them. The translation is optional. The plugin does not incorporate automated or specialist translation.
After installing and activating this Extension, SearchWP will limit the search results page to the active language of your Polylang-powered content division.