Enfold/ q translate xt/ WP Multilang

Hello everyone,

I want to make my website multilingual with q-translate xt, but after installing the plugin I can’t see a button to view the English and German pages. Can someone explain to me how I can see the language-switch-button. Do I need to install another plugin?
Even if I install the WPMultilang plugin, I do not see a language-switch-button

Best,
Marina