The problem with Internationalization in Spring Boot do not work in Configuration file

I'm currently working on a Web-App using Spring boot (including spring security). At the moment i'm trying to integrate internationalization support for the defult language russian as a start.
This is a configuration file where I write to get messages in the Russian language, if the user writed wrong data or e.t but this code returns me In English

import org.springframework.context.MessageSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ReloadableResourceBundleMessageSource;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
import org.springframework.web.servlet.i18n.SessionLocaleResolver;

import java.util.Locale;

@Configuration

public class ConfigForAuth {
    @Bean
    public LocaleResolver localeResolver() {
        SessionLocaleResolver slr = new SessionLocaleResolver();
        slr.setDefaultLocale(new Locale("ru"));
        return slr;
    }

    @Bean
    public MessageSource messageSource() {
        ReloadableResourceBundleMessageSource rs = new ReloadableResourceBundleMessageSource();
        rs.addBasenames("classpath:i18n/messages");
        rs.addBasenames("classpath:/org/springframework/security/messages_ru.properties:1");
        rs.setDefaultEncoding("UTF-8");
        rs.setUseCodeAsDefaultMessage(true);
        return rs;
    }

    @Bean
    public LocaleChangeInterceptor localeChangeInterceptor() {
        LocaleChangeInterceptor localeChangeInterceptor = new LocaleChangeInterceptor();
        localeChangeInterceptor.setParamName("locale");

        return localeChangeInterceptor;
    }
}

But if I will write this same code in Application file this code works fine and returns to me in RU
Application file:

@SpringBootApplication
@ComponentScan("--.--.--")//conf
@EnableCaching
@PropertySources({
        @PropertySource("classpath:application.properties"),
        @PropertySource("classpath:clients.properties")
})
public class OneBpmAuthApiApplication {

    public static void main(String[] args) {
        SpringApplication.run(OneBpmAuthApiApplication.class, args);
    }

Try extending from WebMvcConfigurerAdapter and adding the interceptors.

@Configuration
public class ConfigForAuth extends WebMvcConfigurerAdapter {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
    	registry.addInterceptor(localeChangeInterceptor());
    }

}

I think previous advice was more or less right just you need to set ParamName to "lang" like so:

   @Bean
public LocaleChangeInterceptor localeChangeInterceptor() {
    LocaleChangeInterceptor localeChangeInterceptor = new
            LocaleChangeInterceptor();
    localeChangeInterceptor.setParamName("lang");
    return localeChangeInterceptor;
}

@Override
public void addInterceptors(InterceptorRegistry registry) {
    registry.addInterceptor(localeChangeInterceptor());
}

also please do remember to extend WebMvcConfigurer.