Culture option not working

[Joker-jar]

I tried to use map with russian labels:

L.tileLayer.bing({bingMapsKey: '*****', id: 'bing', imagerySet: 'AerialWithLabelsOnDemand', culture: 'ru', attribution: '.....'}),

But labels still in en_US. So i added this line before line 163 "return url" in getTileUrl method:

url = url.replace(/en\-US/, this.options.culture)

And now all works.

[grumpypixel]

And I was wondering why my desperate attempts to set the culture option don't work.
Thanks for the quick-fix, Joker-Jar!