Node Langauge needs to be undefinde by default
In the "Structure" &gt; "Content types" editing page (/admin/structure/types/manage/article &mdash; replace article to your pin content-type), you can switch on (=tick) Set current language as default for new content in the Extended language options sub-section in the Multilingual settings tab (near the bottom-left).  Then when a user visiting your website is in the English mode and creates a new node (pin?), the language of the node will be English.

It is not Language neutral, but that may be what you can accept?