Manikkavasagar, though he is not counted as one of the 63 Saiva nayanars, he is counted as Nalvars consisting of the first three nayanars namely Appar, Sambandhar and sundharar.
We have included English Version of Tiruvachagam done by G.U. Pope, he was a Christian missionary who spent many years in Tamil Nadu and translated many Tamil texts into English. His other popular translations includes Tirukkural.
There is a famous saying
" திருவாசகத்துக்கு உருகார் ஒரு வாசகத்திற்கும் உருகார்"