text: 
  CREATE OR REPLACE FUNCTION s_website_title_by_lang(
      language_of_user BIGINT
  )
  
  RETURNS TEXT
  
  LANGUAGE SQL
  VOLATILE
  RETURNS NULL ON NULL INPUT
  PARALLEL UNSAFE
  
  AS $$
  
  SELECT tl_website_title
  FROM t_languages
  WHERE tl_id = language_of_user
  LIMIT 1
  
  $$;
  