How to fix Multilang language change is not displayed in posts?

Question

WordPress

How to fix the feature, Multilang language change is not displayed in posts?

Using the Multilang plugin, I change the language on the pages, and when I go to the post, there is no button to change the language to another

Here is the plugin https://uk.wordpress.org/plugins/wp-multilang/
Installed it, everything works well, there are switches to other languages in the admin panel, to change the text, here

screen

If I go to pages or, for example, categories, there is this switch, but if I go to posts, I don’t have it. How can I add it there?

I read about Multilang, he translates Post Category Taxonomy. But I don’t see it

. Found, in Functions.php I registered a function earlier that interfered

Answer 1

Hello!
There is not enough information to answer your question.
1) Why did you decide that this is a bug? And if this is a bug, then we will not help here. Write to the plugin developer.
2) How exactly was the language switcher added to the theme? Is it added to "global" templates like header || footer. Or, for example, displayed in the menu. Maybe you added it to the page.php template and forgot to add it to single.php
3) Some multilingual plugins, depending on the settings, may not show the switch if there is no translation for the current page or post.
Accordingly, add a translation for one post, open the post page and see if the radio button appears

Answer 2

regex101.com
\d{10,99}

Answer 3

https?://steamcommunity.com/profiles/\d{10,}