Add underscore to language query string regex.
Add underscore to language query string regex.

ngosang/adarkroom,snazzysano/adarkroom,fsladkey/adarkroom,purplemilk/adarkroom,bdorer/adarkroom,doublespeakgames/adarkroom,pablo-new17/adarkroom,kaisyu/adarkroom,snazzysano/snazzysano.github.io,DDReaper/adarkroom,acutesoftware/adarkroom,ikoan/adarkroom,Tedko/adarkroom,kaisyu/adarkroom,Tedko/adarkroom,marty13612/darkroom,crafteverywhere/adarkroom,Razynoir/adarkroom,fsladkey/adarkroom,Bleyddyn/adarkroom,gerred/adarkroom,ikoan/adarkroom,snazzysanoj/snazzysanoj.github.io,bdorer/adarkroom,tehp/adarkroom,crafteverywhere/adarkroom,ngosang/adarkroom,snazzysano/snazzysano.github.io,doublespeakgames/adarkroom,kaisyu/adarkroom,snazzysanoj/snazzysanoj.github.io,as02700/adarkroom,Pioneer11X/adarkroom,asteri0n/adarkroom,Bleyddyn/adarkroom,DDReaper/adarkroom,doublespeakgames/adarkroom,snazzysanoj/snazzysanoj.github.io,purplemilk/adarkroom,snazzysano/adarkroom,asteri0n/adarkroom,JamesKent/adarkroom,pablo-new17/adarkroom,as02700/adarkroom,sbakht/adarkroom,tehp/adarkroom,gerred/adarkroom,Razynoir/adarkroom,marty13612/darkroom,Continuities/adarkroom,Pioneer11X/adarkroom,sbakht/adarkroom,Continuities/adarkroom,acutesoftware/adarkroom,JamesKent/adarkroom