Several problems with translated content on my forum

My questions related to my forum are:

Translated forum topics not shown in main forum page

Please can someone tell me which settings I have to change to let forum topics be shown on the main forum page, neither does it show the number of topics and posts? Forum topics are only shown now in the original language (dutch). See https://builddocs.info/forum

Forum topic only shown in original language

When clicked on a forum topic it is only shown in the original language (dutch). But when clicked on it you get redirected right to the translated content. See https://builddocs.info/en/forums/ask-your-question

Comments on forum topic not shown in other languages

The comments on forum sopics are only shown in the original language of that comment. See https://builddocs.info/nl/forum/serre-plaatsen-bij-een-tussenwoning

I have set forums on localize. And content type ‘forum topic’ on enabled, with translation. The content is automatically translated by the Lingotek module.

Thanks in advance.

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