Here is a new maintenance release for Polylang.
The most important change is the removal of the 2 or 3 characters limitations for the language code used in urls. Thus it will now be possible to use code such as en-us or fr-fr. This may help users wanting to differentiate languages variants which share the same ISO 639-1 code. For example fr_FR and fr_CA. It adds compatibility with Aqua Resizer which is often used in porfolio themes and corrects a bug in search forms. Under the hood, it adds support for ‘icl_get_default_language’, an undocumented function from the WPML API which is used by the WARP framework.