how to have like button on every kunena thread ?

The floating buttons at the bottom of this site are done with our JFBCSocialShare module. You can read more about it and see the settings we use to float on the following documentation page:
www.sourcecoast.com/jfbconnect/docs/social-sharing/modules
The very bottom shows the settings we use on this site.

You can also use the JFBCSocialShare module to show the buttons within a module position of Kunena. There are many custom module positions available in Kunena and lots of flexibility with the settings in JFBCSocialShare.

Hopefully you can get what you're looking for with that, but if you need any more assistance, just let us know.

Thanks,
Alex

JFBConnect tries to automatically use the user's language to setup the Like buttons. That can be done using the Language Switcher plugin with Joomla, with a user that's logged in that's set their language or by using Joomla's default language setting.

In some cases, the language may not be the local language for the user because Joomla and/or JFBConnect can't determine it. In that case, the default Joomla language will be used.

You can also force the language in the JFBConnect -> Configuration -> Facebook area if you always want it to be in a specific language.

I hope that helps,
Alex

Glad that you got your issue resolved. Let us know if you run into any further problems.

-Melissa