I forked roots & added an RTL support.
This fork is ideal for multilingual sites which some pages direstion is RTL and some of them LTR.
In this method, the RTL file is loaded ONLY for RTL pages & overwrites the LTR CSS rules.
Other LTR pages just work as usual.
This support added with a few lines & I use it with a few multilingual sites I working right now.
Please let me know if you find a bug or if you have an ideas to improve it.