2 blog pages: changes in wp_config_php is not working

Hi, I added 2 instructions in the wp_config_php file following a solution given in the forum but I don’t see hoe=w it works. How can i set 2 blog pages following these changes:

/**
* WordPress Database Table prefix.
*
* You can have multiple installations in one database if you give each a unique
* prefix. Only numbers, letters, and underscores please!
*/
$table_prefix = ‘wp_’;
$table_prefix = ‘wpenglish_’;
$table_prefix = ‘wpspanish_’;

Can someone tell me what I’m doing wrong or what I’m missing? Thanks.
…by the way i lost my work because it asked for an installation and i didn’t back up my website:((( so now there’s nothing and i have to start from zero but i want to resolve the issue of the 2 blog pages before i start all over againg thanks