Change Language Button on website created with RH 2019 (classic version)

Hi all,

I am developing a website for documents using RH 2019 (Classic Version) and I am having trouble to insert buttons to let the user to change the language (for example: switching between Italian and English). I inserted this code:

<div class="engLang">
<input onclick="setLanguage('ENG')" type="image" name="image" width="30" src="../Azure_Blue/engicon.png" />
</div>
<div class="itaLang">
<input onclick="setLanguage('ITA')" type="image" name="image" width="30" src="../Azure_Blue/itaicon.png" />
</div>

into the <div class="topic main"><div class="functionholder"><div class="buttons"> into topic.slp file and it works for desktop version of the website.

I want to insert the same buttons into the mobile and landscape version of the website and I tried to insert buttons into <div class="functionbar"><div class="nav"> for the landscape version and into <div class="mobilespecialfunctions"> for the mobile version but it does not work as the other buttons (basically my buttons are always displayed in every version of my website). I saw that the other buttons, for example <a class="menubutton">, have some attributes but I cannot understand how to use them on my custom buttons. Here is the code for <a class="menubutton"> for the mobile version:

<div class="mobilespecialfunctions" data-class="sidebar-opened: $mc.isSidebarTab(@KEY_ACTIVE_TAB); mobile-header-visible: @.l.mobile_header_visible; searchpage-mode: @11361180_ACTIVE_TAB == 'fts'" data-attr="aria-hidden: !@KEY_SCREEN_PHONE" role="banner">
<a class="menubutton" data-attr="href: '#'; title:@KEY_LNG.NavTip; aria-hidden: !@.l.mobile_menu_enabled" data-click="$mc.toggleSideBar()"
data-if="@.l.mobile_menu_enabled === true">
<span class="rh-hide" aria-hidden="true" data-html="@KEY_LNG.NavTip"></span>
</a>

</div>

Could you please help me to understand how to show only the proper buttons on the specific version of my website like the other ones?

Thank you in advance for the help.