Uncaught RangeError: Invalid language tag: en-US@posix

[Samurai1201]

When using the floorplan home assistant custom component, the language setting of the browser seems to brake the floorplan.

Uncaught RangeError: Invalid language tag: en-US@posix
    at new RelativeTimeFormat (<anonymous>)
    at floorplan.js?hacstag=188323494114:52:4308

How could i change the language tag?

[strange-v]

Fixed in v1.1.3.
Use BROWSER_LOCALE to set the desired locale as shown in readme.