How to add search with cyrillic and english characters at the same time using gatsby-plugin-flexsearch?

[VitaliyHrabovych]

I did step by step through this guide here and search works great with eng characters but doesn't work with cyrillic. I saw solutions for React plugin but did not for gatsby. So, how can I add search with cyrillic in gatsby-plugin-flexsearch

gatsby-config.js

resolve: 'gatsby-plugin-flexsearch',
      options: {
        languages: ['en'],
        type: 'Mdx',
        fields: [
          {
            name: 'title',
            indexed: true, 
            resolver: 'frontmatter.title',
            store: true
          },
          {
            name: 'slug',
            indexed: false,
            resolver: 'fileAbsolutePath',
            store: true,
          }
        ]
      }

[ts-thomas]

Please message the author of this plugin. Sorry I cant help you.