You could use the same theme and switch out the menu based on a simple token variable.
Set up a token in the MiniMU options to filter from, in this example I’ve used ‘language’ as the token name and ‘spanish’ as the variable:
https://cloud.shanerounce.com/image/32160l393d1c
Next, configure your menu names to work with token variables. ‘menu’ will work as default, ‘menu_spanish’ will work on domains with ‘spanish’ set as the language token variable.
https://cloud.shanerounce.com/image/1u1K0j3C3Q0m
Then, drop this code where ever you want the menu to appear in your theme:
<?php
$token = MiniMU::get_token('language'); // Change language to your token variable.
if ($token == '') { $menuToken = ''; } else { $menuToken = '_' . $token; };
$defaults = array(
'menu' => 'menu' . $menuToken,
'menu_class' => 'nav-classes',
'echo' => true,
'fallback_cb' => 'wp_page_menu',
'items_wrap' => '<ul id="%1$s" class="%2$s">%3$s</ul>'
);
wp_nav_menu( $defaults );
?>
Let me know if this works for you. ??