welcome everybody
Please
Multilingual site Most of the sites link change the language in this way
http: // localhost / en
http: // localhost / ru
And so on
But osclass Different I couldn't access the language change code

I try
<a href="<? php echo osc_base_url (); ?>&lang=en_US"></a>
<a href="<? php echo osc_base_url (); ?>&lang=ru_RU"></a>

Unfortunately, it is unsuccessful

How to get the language link
       
 this works
 <a href="<?php echo osc_item_url_ns(osc_item_id());?>&lang=en_US"></a>
 <a href="<?php echo osc_item_url_ns(osc_item_id());?>&lang=ru_RU"></a>

Because the code is only on the product item

On the home page does not work
<a herf="<? php echo osc_base_url (); ?>&lang=en_US"></a>
<a herf="<? php echo osc_base_url (); ?>&lang=ru_RU"></a>

Thank you

@7ala
Osclass does not support language code in URL, except static pages I think

This works if I add it ?

&lang=ru_RU"

?&lang=ru_RU"

<a herf="<? php echo osc_base_url (); ?>?&lang=ru_RU"></a>

But the problem is that the site appears half translator and the other half not

I don't know what the problem is

I do not think it will work