No idea, HolyC is the only language we need.

Back in March, we added Prayer Filtering to Old School, following an 85% ‘Yes’ vote in Poll 78. Many of you feel our implementation didn’t quite meet expectations, and have suggested improvements. We plan to revisit Prayer Filtering in future, but in the meantime we’re granting third-party clients such as RuneLite our blessing to re-enable this functionality.

For fuck’s sake please just make RuneLite the official client